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Dorcatoma dresdensis Herbst (Col: Anobiidae) and its parasite Diospilus ephippium (Nees) (Hym: Braconidae) reared from Phellinus pomaceus PDF

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Preview Dorcatoma dresdensis Herbst (Col: Anobiidae) and its parasite Diospilus ephippium (Nees) (Hym: Braconidae) reared from Phellinus pomaceus

BR.J. ENT.NAT.HIST., 15: 3/4;2002 135 Kraus, M., 1998. Einige fur Deutschland oder Bayern neue Blattwespen (Hymenoptera: Symphyta), pp. 35-41. In: Taeger, A., Blank, S.M. (Eds.), Pflanzemvespen Deutschlands (Hymenoptera, Symphyta). Kommentierte Bestandsaufnahme, Goecke & Evers, Keltern. Pschorn-Walcher,H., 1982.Pamphiliidae.pp.23-57.In:Schwenke,W.(Ed.),DieForstschddlinge Europas, 4, Haiitfliigler imdZweifliigler. Parey, Hamburg & Berlin. Quinlan, J. & Gauld, I. D., 1981. Symphyta (except Tenthredinidae), Hymenoptera, New Edition. Handbooksfor the identification ofBritish Insects 6 2(a): 1-67. Shinohara, A., 1997. Web-spinning sawflies (Hymenoptera, Pamphiliidae) feeding on larch. Bulletin ofthe NationalScience Museum (A) 23: 191-212. Xiao, G.-r., Huang, X.-y., Zhou, S.-z., Wu J. & Zhang, P., 1992. Economic Scnvfy Fauna of China (Hymenoptera, Symphyta). 226 pp. Tianze Eldonejo, Beijing. (In Chinese.) SHORT COMMUNICATION Dorcatoma dvesdensis Herbst (Col: Anobiidae) and its para—site Diospilus ephippium (Nees) (Hym: Braconidae) reared from Phellinus pomaceus. Examination of some brackets of the uncommon wood-decay fungus Phellimis pomaceus, 7.ii.l999, revealed a small number ofbeetle grubs. A section of the bracket was retained for rearing. Two adult Dorcatoma dresdensis Herbst were later found in the rearing chamber together with about 7 or 8 specimens of the parasitic wasp Diospilus ephippium (Nees). The brackets were characteristically on a blackthorn stem and the host bush was located in an old overgrown hedge. The location was Churn Bank, Elkstone, E. Glos (S091) and the hedge forms the upper boundary of an area of ancient wood pasture along the banks ofthe River Churn. This Nationally Scarce beetle has only once previously been reported from the county(Alexander, 1995), froma Ganoderma—adspersum bracket on anancientparish boundary beech at Rendcomb (SPOO) in 1994 a locality only five miles downstreain along the Churn Valley. This area appears to be a hot-spot in the county for the genus as D. flavicornis (F.) was reared in numbers from red-rotted heartwood ofa fallen oak branch gathered the same day a short distance downstream, the first record ofthis species for the county since 1919 (Atty, 1983). Singletons ofthe beetle Aderus oculatus (PaykuU) and an Eustalomyia anthomyiid fly also emerged from this material. Other species present at the site include Orchesia micans (Panzer), typically developingin brackets ofInonotushispidus on the old ash pollards in the—valley. This Orchesia is verywidespread in this fungus throughout the Cotswold Hills I know it from fourteen 10km squares in the county, mainly in old wood-pasture or ancient wood-edge situations. This is in marked contrast to O. undulata Kraatz which is confined to the larger ancient oakwoods and old parklands and the rarer O. minor Walker, which is also confined to the Cotswold ancient woodlands. Than—ks to Ted Green for finding the fungus and to Mark Shaw foridentifying the wasps. K.N.A. Alexander, 14 Partridge Way, Cirencester. Gloucester GL7 IBQ. References Alexander, K. N. A., 1995. Dorcatoma dresdensis Herbst (Coleoptera: Anobiidae) new to Gloucestershire. British JournalofEntomology andNaturcdHistory 8: 137. Atty, D. B., 1983. Coleoptera ofGloucestershire. Cheltenham, privately published.

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