FAUNA OF ARABIA 17: 7-49 Date of publication: 30.11.1998 Psylloidea (Insecta: Hemiptera) of the Arabian Peninsula Daniel Burckhardt and David Mifsud A b s t r act: The jumping plant-louse fauna of the Arabian Peninsula is reviewed based on published records and material from Bahrain, Kuwait, Oman, Saudi Arabia, the United Arab Emirates and Yemen, the latter being particularly rich. Fifty-two species, nine of which remain unnamed, of 19 genera are recorded. Ten species are described as new, one species is synonymised and two new combinations are proposed. Keys are provided for the identification of the adults and, where known, of the fifth instar larvae. Diaphorina is the most species-rich genus followed by Acizzia, both being widely distributed in the Old World. The Fabaceae bear the largest number of psylloids followed by Chenopodiaceae and Tamaricaceae . .;.,~ J ;; Jy:..:... ~L.. .;.,~ J>- I~~ 4...,.JI ;;.1-):-1 y ~ .11.,kJ1 .;.,L::.!I ~ ~ F- ~I..r" (" :~"j.:!;­ .:.; .. )1 0i)ll ,~I) ;;..bdl 4...,.JI .;.,1}. .. )1I) ~.) yo-JI 4...,.JI ~IJ .)~) ~}JI) .J:!~I Y ~ Jl or (" .l......;;.,. ,'\ ~ ,;;l-,.... ~ ~ljL.. ~ '\ ,\s.j ~ .~~I oh t.lji .)~ ~ y lA>~i )r--k~ a )_. ai ~l.U ~i .~~...l>.- ~ F- ":"I...l>-l (Ipl) t.j e::-".)) ,;;~...l>.- t.lji , • ~) i ,Acizzia ~I ~ ,t.lj\rl Y .)~ p5"1 Diaphorina ~I ~ .;i........\j...1 ljp JI db-) } ~ J ,d.iJWI f .;.,WI ~ t.1.r--ii y .)~ p5"1 .;.,L:J ~I W\s. c$}.; ) .(.....\ill WI ~ t""IJ ~ .)LJ.I ? ~ .~\rl ) ~.;-11 ~\s. ~ ,.11.,kJ1 INTRODUCTION The Arabian Peninsula is situated at the junction of three biogeographical realms. The northern lowlands have affinities with the .Palaearctic, the south with the Afrotropical and the east with the Oriental regions, respectively. Large areas of the peninsula consist of deserts and semi-deserts which stretch, albeit interrupted in places, from Mauritania in the west to India in the east. This area, defined mostly on ecological grounds, is sometimes called the Eremic Zone. In the south-east, south and west of the peninsula are several mountain systems which, in contrast to the lowland deserts, sustain forests (BOTTIKER 1979, LARsEN 1984). The sternorrhynchous jumping plant-lice are well represented in eremic regions throughout the world (HODKINSON 1980, 1989; BURCKHARDT & LAUTERER 1993). Relatively little is known, however, from the Arabian Peninsula. LOGINOVA (1971, 1974) and BURCKHARDT & LAUTERER (1997) recorded four species from Yemen, and BURCKHARDT (1981, 1986) listed 24 species from 8 D. BURCKHARDT & D. MIFSUD Saudi Arabia, based on records in the literature and from available material. Recently, additional collections became available from Yemen, Saudi Arabia, Oman, Kuwait, Bahrain and the United Arab Emirates which are treated here, together with information from the literature. Keys are provided for adults and fifth instar larvae, where known. The keys include a few taxa not reported from the Arabian Peninsula but whose occurrence there is likely. Finally, the biogeographical relationships are briefly discussed, and host plant information is summarised. MATERIAL AND METHODS The classification used here is that of WHITE & HODKINSON (1985) with modifications made by BURCKHARDT (1987, 1991) and HOLLIS (in prep.). The taxa are listed in alphabetical order. Morphological terminology mostly follows HOLLIS (1976, 1984), WHITE & HODKINSON (1982) and OSSIANNILSSON (1992). Measurements are taken from slide-mounted specimens and are given in millimetres. The following abbreviations are used in the keys and descriptions: Adults: AEL length of distal portion of aedeagus AL antenna length (including scape and pedicel) ALHW ratio of antenna length to head width FP female proctiger length FPC ratio of female proctiger to circumanal ring length FPHW ratio of female proctiger length to head width FPS ratio of female proctiger to subgenital plate length HW head width MP male proctiger length MPHW ratio of male proctiger length to head width PL paramere length TLHW ratio of metatibia length to head width WL forewing length WLHW ratio of forewing length to head width WLW ratio of forewing length to width Fifth instar larvae: AL antenna length (including scape and pedicel) AWL ratio of antenna length to forewing pad length BBL . ratio of body length to breadth BL body length CCB ratio of caudal plate to circumanal ring breadth CPB caudal plate breadth CPR ratio of caudal plate length to breadth WL forewing pad length Material was examined, or is cited, from the following collections and institutions: AROB Agricultural Research Organization, Bet-Dagan, Israel BMNH The Natural History Museum, London, U.K. Psylloidea of the Arabian Peninsula 9 MHNG Museum d'histoire naturelle, Geneve, Switzerland MIZW Museum and Institute of Zoology, Warsaw, Poland NHMB Naturhistorisches Museum, Basel, Switzerland NMWC National Museum of Wales, Cardiff, U.K. SMNH Swedish Museum of Natural History, Stockholm, Sweden ZISP Zoological Institute, St. Petersburg, Russia SYSTEMATIC ACCOUNT Psylloidea Key to families of Psylloidea Adults 1 Forewing with a pseudovein between veins Rs and M, lacking a pterostigma. Male subgenital plate with additional lobes Carsidaridae: Mesohomotoma (not recorded from the area) Forewing and male subgenital plate different ............................. . 2 2 Antennal flagellar segments thick, flattened laterally and densely covered in conspicu ous black setae. Male proctiger distinctly 2-segmented Homotomidae: Homotoma (not recorded from the area) Antennal flagellar segment slender, ± rounded in cross-section, not covered in long black setae. Male proctiger usually I-segmented ........................... . 3 3 Forewing with vein R+M+Cul trifurcating or, rarely, bifurcating; costal break and pterostigma always absent; anal break in distance of apex of vein CUlb. Metabasi tarsus without apical black spurs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. Triozidae Character combination absent ........................................ . 4 4 Vein Rs of forewing touching vein Mh2 to form a characteristic cross (Fig. 89) Phacopteronidae: Pseudophacopteron Veins Rs and Ml+2 of forewing separated or connected by cross-vein (in Caillardia dilatata Loginova, 1978) Psyllidae Fifth instar larvae (Taxon not included: Phacopteronidae) 1 Dorsal surface of thorax, wing pads and abdomen with rod setae which are based on tall tubercles Homotomidae: Homotoma (not recorded from the area) Dorsal body surface without rod setae based upon tall tubercles ............... . 2 2 Antennae IO-segmented; tarsal arolium absent; additional porefields present on caudal plate Carsidaridae: Mesohomotoma (not recorded from the area) Character combination absent ........................................ . 3 3 Truncate marginal sectasetae present on wing pads and abdomen; if absent from wing pads then more than 4 + 4 sectasetae present on abdominal margin Triozidae Forewing pads without truncate marginal sectasetae. Caudal plate with, at most, 4 + 4 marginal sectasetae Psyllidae 10 D. BURCKHARDT & D. MIFSUD Family Phacopteronidae Pseudophacopteron sp. Figs 45-46, 89, 106 Ma terial: Yemen: 1 i, Taiz, 20.x.1991; 1 i, Mukeiras, 11.1Y.1993; both A. van Harten, MHNG. Des c rip t ion: Adult: Coloration: Head bright orange with white markings. Eyes light red in colour. Antennae yellow, distal portion of segments 3-8, and entire segments 1,2,9 and 10 dark brown. Dorsal surface of thorax bright orange with fine yellow or white bands. Forewing transpar ent with brown pattern as in Fig. 89. Abdomen brown. S t r u c t u r e: Head, in dorsal view, about as wide as or slightly wider than mesoscutum; vertex entirely covered in coarse surface sculpturing, lacking coronal suture but with a narrow median ridge, on either side of which is an oblique ridge forming a blunt anterior tubercle; frons forming a narrow parallel-sided sclerite with median ocellus distally; antennal insertion with small trans verse tubercle near eye (Figs 45-46). Antennae 10-segmented, segment 3 slightly longer than each of segments 4-8 which are subequal and weakly widened to apex; segments 9 and 10 thicker than 3-8; terminal setae respectively 1 and 2 times as long as segment 10; segments 4-9 each with a subapical rhinarium. Clypeus short, globular. Pronotum short, bearing a small median tubercle. Meso- and metanotum flattened. Propleurites narrow, epimeron larger than episternum. Forewings as in Fig. 89; surface spinules absent apart from a few along the outer margin and in cell Legs CUlb' long; metacoxa with short, pointed meracanthus; metatibia without genual spine, apex with a crown of light, weakly sclerotised setae; metabasitarsus with two sclerotised spurs. Female genitalia as in Fig. 106, male unknown. Measurements (1 ?): HWO.33; AL 0.47; WL 1.08; FP 0.27; ALHW 1.41; TLHW 0.94; WLHW 3.27; WLW 2.16; FPHW 0.82; FPC 3.00; FPS 1.29. Larva and host plant unknown. Rem ark s: The two specimens available belong to an undescribed species similar to the Mrican Pseudophacopteron zimmermanni (Aulmann, 1912) from which they differ in the presence of a dark band on the forewing. In the absence of more material, in particular males and larvae, the species is not formally named here. Family Psyllidae Key to subfamilies of Psyllidae Adults 1 Metacoxae slender, without meracanthus but bearing a weakly sclerotised tubercle at trochanteral cavity Rhinocolinae (not recorded from the area) Metacoxae thick with horn-shaped meracanthus, without sclerotised tubercle at trochanteral cavity ................................................. . 2 2 Genae forming flattened anterior lobes, lying in the same plane as vertex and enclosing median ocellus. Antennae arising on the underside of the head Liviinae Genae rounded or forming conical anterior lobes, if flattened and enclosing median ocellus then not lying in the same plane as vertex. Antennae arising on fore margin of head, bases not concealed from above ................................. . 3 3 Apical spurs of metatibia forming an open crown, if grouped then head bearing preocular sclerite ................................................... . 4 Apical spurs of metatibia always grouped, head without preocular sclerite ....... . 5 Psylloidea of the Arabian Peninsula 11 4 Head without conical genal processes; occipital margin distant from forewing base. Male proctiger with large wing-like posterior processes Aphalarinae Either head bearing conical genal processes (Figs 39-44, 47-50), or occipital margin adjacent to forewing base. Male proctiger straight or weakly produced posteriorly, lacking large wing-like processes (Figs 57, 59) Diaphorininae 5 Head with very short, blunt genal processes. ALHW < 1.2 ................... . 6 Head with long, pointed genal processes, or ALHW > 1.2 ................... . 8 6 Branches of vein M of forewing longer than stem Pachypsylloidinae Branches of vein M of forewing shorter than stem ......................... . 7 7 Forewing with brown pattern consisting of an apical and a median transverse band which are fused in the middle (Fig. 95). Distal segment of aedeagus with oval apical dilatation (Fig. 107) Euphalerinae Forewing dark or reddish brown with irregular small light spots. Distal segment of aedeagus with apical dilatation forming both a dorsal and a ventral extension Aphalaroidinae 8 Male proctiger bearing a large posterior lobe (Fig. 15). Genal processes less than half vertex length (Fig. 10), or if longer then ALHW > 1.6 Acizziinae Male proctiger without posterior lobe. Genal processes more than half vertex length, ALHW < 1.6 ..................................................... . 9 9 Metatibia with large genual spine Arytaininae Metatibia without genual spine, at most a small tubercle Psyllinae Fifth instar larvae (Taxa not included: Pachypsylloidinae and Psyllinae) 1 Extra pore fields on caudal plate present ................................. . 2 Extra pore fields on caudal plate absent .................................. . 4 2 Tarsal arolium sessile Rhinocolinae (not recorded from the area) Tarsal arolium petiolate .............................................. . 3 3 Abdominal margin with some sectasetae Euphalerinae Abdominal margin without sectasetae Liviinae 4 Tarsal arolium membranous, without unguitractor Aphalarinae Tarsal arolium with well-developed unguitractor ........................... . 5 5 Antennae 9-segmented Acizziinae Antennae 3- to 8-segmented .......................................... . 6 6 Usually without capitate setae, at most short club-shaped setae Diaphorininae Always with long capitate setae ........................................ . 7 7 Antennae 3-segmented Aphalaroidinae Antennae 7 -segmented Arytaininae Subfamily Acizziinae Key to species of Acizzia Adults 1 Genal processes half vertex length or more (Fig. 12). Vein C+Sc of forewing thick (Fig. 7) .......................................................... . 2 Genal processes less than half vertex length (Fig. 10). Vein C+Sc of forewing slender (Fig. 5) .......................................................... . 3 12 D. BURCKHARDT & D. MIFSUD 2 Forewing (Fig. 7) with distinct brown band along outer margin. Genal processes blunt apically (Fig. 14). Genitalia as in Figs 27-29 Acizzia virgata n. sp. Forewing (Fig. 3) without distinct brown band along outer margin. Genal processes subacute apically (Fig. 12). Genitalia as in Figs 21-23 Acizzia hirsuticauda n. sp. 3 Pterostigma of forewing sessile, wing pattern as in Fig. 8. Genitalia as in Fig. 30 Acizzia wittmeri Pterostigma of forewing petiolate, wing pattern and genitalia different .......... . 4 4 AL>1.0mm ..................................................... . 5 AL<I.Omm ..................................................... . 7 5 Forewing with well-defined brown submarginal band (Fig. 5). Male proctiger with narrow posterior lobe Acizzia marginata Forewing with indistinct brown submarginal band (Fig. 4). Male proctiger with broad posterior lobe ................................................ . 6 6 Surface spinules of forewing covering the whole surface apart from stripes along the veins (Fig. 9). Genitalia as in Figs 15-17; male proctiger, in profile, with angular posterior lobes; apex of female procdger relatively massive Acizzia didyma n. sp. Surface spinules of forewings restricted to base and apex of wing. Male proctiger, in profile, with broadly rounded posterior lobe; apex of female proctiger relatively slender Acizzia hollisi 7 Head black, pronotum ochreous, mesonotum brown. Genual spine present. Surface spinules arranged in irregular hexagonal pattern. Genitalia as in Figs 24-26 Acizzia melanocephala n. sp. Head lighter, about the same colour as pro- and mesonotum. Genual spine indistinct or absent. Surface spinules of forewing irregularly spaced. Genitalia different ..... . 8 8 Forewing widest in the middle (Fig. 1). Paramere with hook in the middle of fore margin. Female subgenital plate truncate apically Acizzia bona Forewing widest in apical fifth (Fig. 2). Paramere without hook on fore margin (Fig. 19). Female subgenital plate acute apically (Fig. 20) Acizzia halperini n. sp. Fifth instar larvae (Taxa not included: Acizzia didyma n. sp., A. hirsuticauda n. sp., A. virgata n. sp. and A. wittmerz) 1 Caudal plate without long dorsal capitate setae ............................ . 2 Long capitate setae present on dorsum of caudal plate ...................... . 3 2 Margin of caudal plate with long rod setae (Fig. 34) Acizzia melanocephala n. sp. Margin of caudal plate with a few long capitate setae (Fig. 31) Acizzia bona 3 Forewing pad with long dorsal capitate setae (Fig. 36) Acizzia halperini n. sp. Forewing pad without or with short dorsal capitate setae (Fig. 37) ............. . 4 4 Forewing pad without dorsal capitate setae. Wing pads and caudal plate ochreous dorsally, weakly sclerotised Acizzia hollisi Forewing pad with short dorsal capitate setae. Wing pads and caudal plate brown dorsally, strongly sclerotised Acizzia marginata Acizzia bona Loginova, 1967 Figs 1, 31, 35 Acizzia bona Loginova, 1967. - Annalen des Naturhistorischen Museums Wien 70: 407. Material: Saudi Arabia: 1 i, Wadi Mizbil, 25.11.1977, W. Biittiker, NHMB. Reported from Sudan (LOGINOVA 1967) and Saudi Arabia (BURCKHARDT 1986). H 0 s t p I ant s : Acacia ehrenbergiana Hayne, A. seyal Del. (Fabaceae) Psylloidea of the Arabian Peninsula 13 2 3 4 6 7 8 Figs 1-8: Forewing of Acizzia species. 1: A. bona. 2: A. halperini n. sp. 3: A. hirsuticauda n. sp. 4: A. hollisi. 5: A. marginata. 6: A. me/anocepha/a n. sp. 7: A. virgata n. sp. 8: A. wittmeri. Acizzia didyma n. sp. Figs 9-10, 15-17 Holotype: d, Yemen, West Aden Protectorate, Jabal Jihaf, c. 7000 feet, 19.1X.1937, swept from low herbage between rocks, B.M. Exp. to SW Arabia, H. Scott & E.B. Britton, BMNH. - Par a t y pes: Ye men: 18 d d, 24 ~ ~, same data as holotype but BMNH, NHMB; I ~, same data but c. 7100 feet, 29.1X.1937, from edges of terraced fields, BMNH. D i a g nos is: Genal processes short. Male proctiger, in profile, with angular posterior lobes; male subgenital plate long. Fore margin of parameres bearing a hook. Des c rip t ion: Adult: Coloration: Head whitish yellow with extended brown patches on vertex; eyes reddish. Antennal segments pale yellow with distal portions of segments 3-7 and entire segments 8-10 brown to dark brown. Dor~al face of thorax and abdomen yellow to orange with extended brown pattern, forming longitudinal stripes on mesopraescutum and mesoscutum. Head and thorax laterally and ventrally whitish to yellow with dark spots. Abdomen whitish ventrally, 14 D. BURCKHARDT & D. MIFSUD genitalia reddish to brown. Forewings transparent, veins yellow, membrane whitish with indistinct light brown band along outer wing margin and slightly darker brown spots in the middle of the cells along the outer wing margin (Fig. 9). Legs brown with yellowish tibiae and tarsi. S t rue t u r e: Head (Fig. 10) with short genal processes which bear several long hairs; vertex covered in short hairs, microsculpture restricted to margins. Forewing (Fig. 9) oblong-oval, widest in the middle, vein C+Sc slender, pterostigma petiolate. Surface spinules covering all cells, leaving narrow spinule-free stripes along the veins; irregularly and densely spaced, fine; radular spinules forming indistinct patches along wing margin in cells rs, ml+2' m3+4 and CUla' Metatibia with distinct, small genual spine. Genitalia as in Figs 15-17. Measurements (2 dd, 2 <J<J): HW 0.61-0.66; AL 1.09-1.29; WL 1.57-1.98; MP 0.19-0.20; PL 0.25-0.26; AEL 0.20-0.22; FP 0.64-0.67; ALHW 1.79-2.02; TLHW 0.69-0.79; WLHW 2.57-3.00; WLW 2.21-2.38; MPHW 0.31-0.32; FPHW 0.97-1.02; FPC 3.94-4.27; FPS 1.42-1.46. Larva and host plant unknown. Re mar ks: Acizzia didyma shares with A. bona, A. hollisi, A. marginata and A. melanocephala n. sp. the short genal processes, the long male subgenital plate and the hook on the fore margin of the parameres. Based on the shape of the distal portion of the aedeagus and of the male proctiger, A. didyma may be most closely related to A. hollisi. It differs from similar species as indicated in the key. Acizzia halperini n. sp. Figs 2, 11, 18-20,32,36 Acizzia sp. 2. - Burckhardt 1986: 157. Acizzia sp. - Burckhardt & Halperin 1992: 46. Holotype: d, Yemen, Yarim to Hamam Dam, 19.III.1993, A. van Harten, MHNG. - Paratypes: Saudi Arabia: 4 dd, 8 99, Wadi Shaib Luha, 15.1.1977, W. Biittiker, NHMB; 1 9, same data but Juayflniyan, 960 m, 26.IY.1981; 1 d, Riyadh, 5.Y.1981, A.S. Talhouk, NHMB. - Ye men: 2 d d, 6 99, 3 larvae, same data as holotype; 4 d d, 5 99, 2 larvae, near Sana'a, 3.VII.1991, on Acaciasp., MHNG, ZISP; 1 d, 1 9, Sana'a, VI1.1991, in light-trap, MHNG; 1 9, same locality but IY.1992, in Malaise-trap; 2 d d, 5 99, Mabar to Medinat al-Shirq, 12.III.1992, on Acacia sp., MHNG; all A. van Harten. - Pales tin e: 1 9, En Yahav, 12.III.1989, on Acacia raddiana; 1 9, En Gedi, 25.III.1989, on Acacia raddiana; 1 9, Hazera N, 9.1.1990, on Acacia raddiana, A. torti/is; 1 9, Evrona, 9.1.1990, on Acacia raddiana, A. torti/is; 1 9, Zomet ha Arava, 10.1.1995, on Acacia raddiana; all J. Halperin; 1 9, Nahal Zofar, ll.IY.1992, B. Merz & Freidberg, MHNG. D i a g nos is: Genal processes short. Antennae shorter than 1.0 mm. Forewings transparent, evenly spotted. Male subgenital plate short. Fore margin of parameres without hook. Des c rip t ion: Adult: Coloration: Head yellow with light grey eyes. Antennal segments pale yellow with distal portion of segments 3-10 slightly darker. Dorsal surface of thorax bright yellow, usually with white and orange markings. Abdomen yellow to orange. Venter of body white to light yellow. Forewings transparent, evenly spotted as in Fig. 2. S t rue t u r e: Head (Fig. 11) with short genal processes which bear several long hairs; vertex covered in fine sculpture and short hairs. Forewing (Fig. 2) gradually widening to apical fifth, vein C+Sc slender, pterostigma petiolate. Surface spinules covering all cells, leaving narrow spinule-free stripes along the veins; irregularly and densely spaced, fine; radular spinules forming indistinct patches along wing margin in cells rs, ml+2' m3+4 and CUla' Metatibia with indistinct genual spine. Genitalia as in Figs 18-20. Measuremen ts (1 d, 3 <J <J): HW 0.54-0.58; AL 0.84-0.95; WL 1.54-1.87; MP 0.16; PL 0.22; AEL 0.20; FP 0.49-0.54; ALHW 1.47-1.74; TLHW 0.72-0.86; WLHW 2.85-3.22; WLW 2.11-2.23; MPHW 0.30; FPHW 0.84-0.93; FPC 3.27-3.38; FPS 1.36-1.48. Fifth instar larva: Coloration (of slide-mounted specimens): Sclerotised plates light ochreous. Membranes colourless. Psylloidea of the Arabian Peninsula 15 9 13 Figs 9-14: Acizzia species: Forewing (9) and head in dorsal view (10-14). 9-10: A. didyma n. sp. 11: A. halperini n. sp. 12: A. hirsuticauda n. sp. 13: A. melanocephala n. sp. 14: A. virgata n. sp. S t rue t u r e: Body elongate. Antenna 9-segmented with each a subapical rhinarium on segments 3, 5, 7 and 8; segment 3 with two, and segments 4 or 5 with one capitate setae which are about as long as diameter of segments. Thoracic tergites small. Legs with normal, long setae and a few long capitate setae; tarsal arolium triangular, with unguitractor and long pedicel. Surface of wing pads and caudal plate covered in spine-like microsculpture. Forewing pads (Fig. 36) elongate with several long lateral and dorsal capitate setae. Caudal plate (Fig. 32) with many dorsal and lateral capitate setae. Outer circumanal ring small, consisting of a single row of pores. Measurements (3 larvae): AL 0.52-0.57; WL 0.51; BL 1.15-1.29; CPB 0.59-0.69; AWL 1.02-1.12; BBL 1.22-1.24; CPR 0.58-0.65; CCB 8.43-9.29. Reported as Acizzia sp. 2 from Saudi Arabia (BURCKHARDT 1986) and as Acizzia sp. from Palestine (BURCKHARDT & HALPERIN 1992). H s t p I ant s : Acacia tortilis (Forsskal) Hayne ssp. tortilis (Forsskal) Hayne and ssp. raddiana 0 (Savi) Brenan (Fabaceae). Rem ark s: Based on the structure of the male genitalia Acizzia halperini is related to A. bona from which it differs as indicated in the above key. 16 D. BURCKHARDT & D. MIFSUD Acizzia hirsuticauda n. sp. Figs 3, 12,21-23 Holotype: e!, Yemen, Sana'a, VIII.1991, in light-trap, A. van Harten, MHNG. - Paratype: Yemen: 1 9, same data as holorype but VII.199 1. D i a g nos is: Genal processes long. Vein C+Sc of forewing thick. Female proctiger strongly setose dorsally. Des c rip t ion: Adult: Coloration: Dorsal surface of head and thorax bright orange. Abdo men light yellow. Eyes dark orange to light red. Antennal segments yellow with only last two segments dark brown. Forewing with no distinct pattern (Fig. 3). Venter of body white to light yellow. Structure: Head (Fig. 12) with subacute conical genal processes which are about half the vertex length and bear long hairs; vertex covered in fine sculpture and short hairs. Forewing (Fig. 3) widest in the middle, vein C+Sc thick, pterostigma petiolate. Surface spinules covering all cells, leaving broad spinule-free stripes along the veins in basal portion and narrow stripes apically; irregularly and densely spaced, fine, slightly denser apically; radular spinules forming indistinct patches along wing margin in cells rs, mI+2' m3+4 and CUIa' Metatibia with distinct genual spine. Genitalia as in Figs 21-23. Measurements (1 C!, 1 Cf): HW 0.59-0.71; AL 1.10-1.17; WL 1.81-2.08; MP 0.17; PL 0.24; AEL 0.23; FP 0.64; ALHW 1.55-1.98; TLHW 0.68-0.76; WLHW 2.93-3.07; WLW 2.13-2.29; MPHW 0.29; FPHW 0.90; FPC 4.00; FPS 2.78. Larva and host plant unknown. Rem ark s: Acizzia hirsuticauda shares with A. virgata n. sp. the relatively long genal proces ses, the widened vein C+Sc of the forewing and the presence of a genual spine. It differs as indicated in the key. The species is unusual for its modified female genitalia which are similar to those of Acizzia dodonaeaeTuthill, 1952, from New Zealand and several undescribed species on Dodonaea spp. and Amyema spp. from Australia (MHNG data). Acizzia hollisi Burckhardt, 1981 Figs 4, 33, 37 Acizzia hollisi Burckhardt, 1981. - Fauna of Saudi Arabia 3: 216. Material: Oman: 1 9, Wadi Ghul, 2.xI.1990, M.D. Gallagher &J.c. Deeming, NMWC. - Yemen: 1 9, al-Mahwit, 7.VI.1991, on Ficussp.; 1 e!,2 99, Sana'a, VII.1991, in light-trap; 6 e!e!, 499, same data but IX. 1992, in light-trap and Malaise trap; 1 e!, Taiz to ar-Rahidah, 14.III.1993, all A. van Harten, MHNG; 1 9 Sanhan, I.1993, on apple, M. Knapp, MHNG. Reported from Saudi Arabia and Palestine (BURCKHARDT 1981, 1986; HALPERIN et al. 1982; HODKINSON & HOLLIS 1987). H 0 s t p I ant s : Acacia tortilis (Forssl.cll) Hayne ssp. raddiana (Savi) Brenan, perhaps also ssp. spirocarpa (Hochst. ex A. Rich.) Brenan (Fabaceae). Acizzia marginata Burckhardt, 1986 Fig. 5 Acizzia marginata Burckhardt, 1986. - Fauna of Saudi Arabia 7: 151. Material: Sa udi Arab ia: 1 e!, Wadi Johan, Abha, 2150 m, 19.IY.1976, W. Wittmer & W. Biittiker, NHMB; 2 99, same data but Village Qaraah, Khamis Mountains, 2000 m, 16.IY.1976; 1 9, same data but 15.Iy'1976; 1 9, same data but Wadi Harth, 28.VIII.1978, W. Biittiker. - Ye men: 1 e!, 1 9, Sana' a, II.1991; 2 9 9, same data but VII.1991, in light trap; 2 e! e!, 1 9, same data but II.1992, in light-trap; 1 9 same data but IY.1992, in Malaise-trap; 1 e!, same data but XI1.1992, in Malaise-trap; 11 e!e!, 19 99, 17 larvae, al-Mahwit, 7.VI.1991, on Acacia sp.; 4 e!e!, 2 99, same data but 21.IX.1991, beaten from vegetation; 1 9, al-Wasitah, Qa Jahran, 17.IX.1991, on Acacia sp.; 1 9, 1 larva, al-Mahwit to Khamis Bani Sa'ad, Wadi Sara' a, 17.II1.1992; all A. van Harten, MHNG; 2 9 9, Sanhan, II.1992, on peach; 1 9, same data but VIII.1993, on apple; 3 e! e!, 1 9, Mabar, VI1.1993, on peach; all M. Knapp, MHNG. Reported from Saudi Arabia, Kenya and Tanzania (BURCKHARDT 1986). H 0 s t p I ant s: Acacia abyssinica Hochst. ex Benth., A. hockii De Wild., A. /ahai Steud. & a.E Hochst. ex Benth., AlbiziagummiJera Gme!.) c.A. Sm. (Fabaceae).