The original species description is presented here in text form, taken directly from: Cushman, R.A. 1915. Descriptions of six new species of ichneumon-flies. Proceedings of the U.S. National Museum 48: 507-513.
Idechtis nigricoxalis, new species
Female.-Length, 10mm. Related to erythropus Ashmead, from which it differs as follows: Scape and pedicel beneath and mandibles dark testaceous instead of pale yellow; pronotum laterally shining, with strong latitudinal rugae (opaque in erythropus ); tegulae dark testaceous rather than whitish; all coxae and hind legs throughout black, front and middle femora and trochanters and middle tibiae infuscated; basal lateral areas of propodeum with a few large punctures, petiolar areas more strongly transversely rugose.
Male.-Length, 8mm. Differs from female principally in having the posterior legs beyond the coxae dark testaceous, in largely lacking the infuscation on the front and middle legs, and in lacking the punctures on the basal lateral areas of the propodeum.
Type.-Cat. No. 18354, U.S.N.M
Type-locality.-Youngstown, New York.
Host.-Eusophera semifuneralis.
Described from two females and two males as follows: The type female bears the further data Quaintance No. 574, 7.31.05 F. Johnson collector; and the allotype Quaintance No. 7966, Vienna, Virginia, VII.11.13. reared by R.A. Cushman (host unknown); a female (paratype B) which agrees with the allotype in the color of the legs bears the number Quaintance No. 407 (this number referring to a note which shows that the host was the larva of E. semifuneralis), Fort Valley, Georgia, 6.8.05, J.H. Beattie, collector, and a male (paratype A) which is somewhat smaller than the allotype labelled Quaintance No. 5626, Lakeside, Ohio, 5.22.08, on peach, H.F. Wilson, collector.
With the exceptions noted this species is very similar to erythropus and may possibly be an eastern form of that species, especially since some specimens of erythropus have the four anterior coxae more or less infuscated basally.
Additional specimens from Youngstown, New York, were reared from Euzophera semifuneralis and one from Fort Valley, Georgia, from Sanninoideae exitiosa.
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Cushman, R.A. 1915. Descriptions of six new species of ichneumon-flies. Proceedings of the U.S. National Museum 48: 507-513.
Fattig, P.W. 1950. The Ichneumonidae or Parasitic Hymenotpera of Georgia. Emory University Museum Bulletin, no. 9. 78p.
Solomon, J.D. 1995. Guide to Insect Borers of North American broadleaf trees and shrubs. Agric. Handbook. 706. Washington, D.C.: U.S. Department of Agriculture, Forest Service. 735p.
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