J.Entomol. Soc.Brit.Columbia 104,December2007 91 SCIENTIFIC NOTE Meconema thalassinum (Orthoptera: Tettigoniidae), a foreign katydid established in British Columbia ROBERT A. CANNINGS\ JAMES W. MISKELLY^ CATRIEN A.H, SCHIFFER^ KAR LUN ALAN LAU^ and KAREN M. NEEDHAM^ Meconema thalassinum (De Geer), a from the Lower Mainland region of south- katydid in the tettigoniid subfamily Me- western British Columbia (from the Greater conematinae, is a European native estab- Vancouver area east to Maple Ridge and lished in northeastern North America since Langley) between 1991 and 2007 1957 (Capinera et al. 2004). In the pub- (Collections deposited in RBCM - Royal lished literature it is known as far west as British Columbia Museum, Victoria, BC; Michigan and extreme southwestern On- SFU - Simon Eraser University collection, tario (Marshall etal 2004). Bumaby, BC; UBC - Spencer Entomologi- Rather than stridulating by rubbing the cal Museum, University ofBC, Vancouver, forewings together, as most Ensifera do, BC). Most specimens (25 of 31) were col- males call at night by tapping their hind lected by entomology students for class tarsi on leaf surfaces or other substrates, projects at Simon Eraser University and the and thus M. thalassinum is known in North University ofBritish Columbia. The earliest America as the Drumming Katydid. The records are from Surrey (16 September drumming is quiet, but sometimes may be 1991, J. Mayer (SFU)) and Haney (22 Sep- m heard 3 to 4 away (Capinera etal. 2004). tember 1991, S. Chaabra (SFU)). The species is pale green with a dorsal yel- David Holden (pers. comm.), trapping low stripe on the head and prothorax. Gypsy Moths with pheromone-baited delta mm Adults range from 14 to 20 in length; traps, has found numerous Meconema both sexes are fully winged and have an specimens in the Vancouver and Lower exposed tympanum on each fore tibia. The Eraser Valley areas; the insects are appar- female has a curved ovipositor as long as ently entering the traps for shelter or to eat the abdomen (Fig. la); the male's subgeni- dead insects trapped there. At 133 Powell tal plate is bifid, long and strongly up- Street in downtown Vancouver, Bruce curved (Fig. lb). Meconema thalassinum Triggs captured a male in his apartment on lives mainly in deciduous trees and is 9 August 2006 (RBCM). Catrien Schiffer mostly nocturnal; it eats insects as well as has observed the species for three years at leaves (Johnstone 1970). her home on Puget Drive in Vancouver, a Although there are recent photographs locality dominated by large trees and gar- posted on the Internet (BugGuide 2007) dens. On 29 July 2005 a female appeared from southwestern British Columbia and above the front door and both a male and one from King County, Washington, this female were seen there intermittently over paper documents the earliest western North the next two weeks. A male perched at the American records of M. thalassinum and same place from 20 July 2006 until mid- the subfamily Meconomatinae. They come August, when it was found dead (Fig. lb) 'Corresponding author: Royal British ColumbiaMuseum, 675 Belleville Street, Victoria, BC V8W 9W2, (250)356-8242,[email protected] ^ 1444ArlingtonPlace,Victoria,BC V8N2B9 ^4015 PugetDrive,Vancouver,BC V6L2V3 ^ SpencerEntomological Museum, DepartmentofZoology,UniversityofBritishColumbia, 6720Univer- sityBoulevard,Vancouver,BC V6T 1Z4 92 J.Entomol. Soc.Brit.Columbia 104,December2007 Figure 1. Meconema thalass- inum. (a) Female. Vancouver, 5 September 2006, Murray Isman (Spencer Entomological Mu- seum), (b) Male. Vancouver, 4015 Puget Drive, found dead, 19 August 2006, Catrien A.H. Schiffer (Royal BC Museum). Photos: DarrenCopley. (RBCM). Two females died in this garden and land transportation hub and many in August (RBCM) and a third was photo- routes for the immigration of Meconema graphed in September 2006. In 2007, both are available. Its small size, attraction to males and females were observed there human habitations and propensity for hid- between 8 August and 2 November. The ing in small spaces suggests that it may be closely timed appearance of adults at the an efficient traveller in human cargo. Al- same location in three consecutive years though it has spread only slowly between indicates that, althoughno courtship ormat- New York and Michigan in the 50 years ing behaviourhas been observed at the site, since its initial North American introduc- breeding is occurring in the area. tion, it appeared frequently in Toronto in Meconema thalassinum is clearly well 2007 (Steve Marshall, pers. comm.). The established in the Vancouver and Lower species feeds on a wide variety of decidu- Fraser Valley region of British Columbia ous trees and shrubs, but it has never been and there is one photographic record from considered a pest in its native Europe or in Issaqua, King County, Washington taken in eastern North America and it is unlikely to August 2007 (BugGuide 2007). As far as is become one inBritish Columbia. known, the Lower Mainland of BC is the We thank Murray Isman and Yasmin only region west of Michigan where this Akhtar (University of BC), David Holden exotic species is established. Whether this (Canadian Food Inspection Agency, Bur- population is the result ofspecimens trans- naby, BC), Steve Halford (Simon Fraser ported west from eastern North America, or University), Bruce Triggs (Vancouver) and ifthe founders came directly from Europe, Steve Marshall (University of Guelph) for is unknown, Vancouver is a major air, sea specimens andinformation. REFERENCES BugGuide. 2007.Meconema thalassinum.http://bugguide.net/node/view/8022/bgimage. Capinera,J.L., R.D. ScottandT.J. Walker. 2004. Fieldguidetograsshoppers,katydids andcrickets ofthe UnitedStates.CornellUniversityPress, Ithaca,NY. Johnstone, D.E. 1970. Notes on the palaearctic grasshopper, Meconema thalassinum (De Geer), (Orthoptera: Tettigoniidae: Meconematinae) established in Long Island, New York. Entomological News 81: 62-65. Marshall, S.A., S.M. Paiero andO. Lonsdale. 2004. Newrecords ofOrthopterafromCanadaandOntario. JournaloftheEntomological SocietyofOntario 135: 101-107.