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Tycherus nigridens (Wesmael, 1845) (Hym.: Ichneumonidae) new to Britain PDF

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Preview Tycherus nigridens (Wesmael, 1845) (Hym.: Ichneumonidae) new to Britain

TYCHERUSNIGRIDENSNEWTOBRITAIN 109 TYCHERUSNIGRIDENS (WESMAEL, 1845) (HYM.: ICHNEUMONIDAE) NEWTO BRITAIN WilliamA. Ely RotherhamBiologicalRecordsCentre,3rdFloor,NorfolkHouse,WalkerPlace,RotherhamS601ES. Abstract Tycherus nigridens (Wesmael) (Hym.: Ichneumonidae) is recorded as a British species from Yorkshire.ThesecondandthirdBritishrecordsofPhaeogenescurator(Thunberg)arealsoreported. Introduction I am indebted to Erich Diller of the Zoologische Staatssammlung in Munich for determining two female specimens ofthis Tycherus nigridens (Wesm.), which I had failedtoidentify inPerkins' RESkey (Perkins, 1959). Theirdetails are: VC 62: ForgeValley, Scarborough (SE9887) 5.9.1986, collectedbyW.A.Ely. VC63: Hartley Brook Dyke, Sheffield (SK 363931) 2.9.1987 collected by A.Brackenbury. The genusPhaeogenes sensu Perkins has beendivided since 1959 and Tycherus is oneofthe segregates. This species runs tocouplet 14 inPerkins' key toPhaeogenes, but differs from the two options there (heterogonus and curator) principally on the structure of the hind coxae, which resemble Perkins' fig. 387. The basic colour scheme of the two Yorkshire specimens is similar to both these species but the anterior legs are red with the tarsi only slightly infuscated and the hind femora are redonthebasal thirdandblackonthe apicaltwo-thirds. Therestofthehindlegs are coloured as in heterogonus and curator while the postannellus is shorter than the followingflagellarsegment(as incuratorbutmore slender). Perkins could only record one specimen ofPhaeogenes curator (Thunberg) from BritainandItakethis opportunity toplace onrecordtwoothers: VC63: NewsholmeDene, Keighley (SE04) 14.9.1948 collectedbyJ.Wood(det W.A.Ely). VC 63: Holmehouse Wood, Keighley (SE04) 5.10.1948 collected by J.Wood (detW.A.Ely). Bothspecimens areintheManchesterMuseumcollections. Acknowledgements IamgratefultoDrTereshkinofBelorussiaforarrangingthetransferofspecimens to MunichandinparticulartoErich Dillerfortheirdetermination. Iam also grateful to Austin Brackenbury for the many ichneumons he has collected to further our knowledge of the Yorkshire fauna, to Colin Johnson for allowing access to unidentified specimens in the Manchester Museum and to Mike Fitton for allowing accesstotheNaturalHistoryMuseumcollectionstoverifymydeterminations. References Perkins, J.F., 1959. Hymenoptera Ichneumonoidea Ichneumonidae, key to subfamilies and Ichneumoninae - I. Handbooksfor the Identification ofBritish Insects Vol. VII Part 2(ai). RoyalEntomologicalSocietyofLondon,London.

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