NO. 1789. NEW ICHNEUMOy-FLIES—VIERECK. 403 



except for a few indistinct siibapical punctures; abdomen almost 

 entirely black, hypopygium buttress shaped, exserted portion of 

 sheaths of the ovipositor linear, nearly parallel sided and as long as 

 or nearly as long as the gaster above. 



Male. — Answers the descripfion of the opposite sex sufficiently well 

 to be recognized thereby. 



Type-locality. — Colorado Springs, Colorado. 



Type.—Csit. No. 13341, U.S.N.M. 



Presumably parasitic upon Argyresihia, sp. and labeled Ex Quercus 

 April 2, 1910. E. Bethel, collector. 



Three specimens, of which two are females. The female paratopo- 

 type has the lateral longitudinal carina apparently wanting, but 

 replaced by an incomplete costula. 



Named for the collector, E. Bethel. 



Genus MICROGASTER Latreille. 



MICROGASTER COMPTAN.ffi, new species. 



Female. — 2.5 mm. Clypeus not entirely separated from the face 

 by a suture; propodeum coarsely rugose and with a distinct longi- 

 tudinal median carina; second dorsal plate nearly parallel sided, 

 almost four times as wide at apex as long down the middle, the latter 

 distance one-half the similar distance on the first plate; these two 

 plates uniformly and similarly irregularly reticulate and entirely black, 

 the second plate uninterrupted longitudinally, but with an apical row 

 of shallow fovese; the succeeding plates or segments black, smooth, 

 and polished; the third with a few punctures that are in most cases 

 more than four or five puncture widths apart; the remaining segments 

 apparently impunctate, ventral segments also black; coxte black, 

 rest of legs more or less stramineous to testaceous, the tarsi more or 

 less fuscous. 



Type-locality. — Rocky Ford, Colorado, "bred from Ancylis comp- 

 tana, September 2, 1909, H. O. Marsh, collector, Chittenden No. 

 1537°," Bureau of Entomology, Washington, D. C. 



Type.—Cat. No. 13342, U.S.N.M. 



Genus HETEROSPILUS Haliday. 



HETEROSPILUS MORDELLISTENiE, new species. 



Female. — 2.5 mm. Related to {Csenophanes) Heterospilus antJia- 

 xise (Ashmead) from which it differs chiefly as follows : Head entirely 

 black or blackish, head above distinctly transversely striate, in 

 anthaxise there are striae, but these are so fine as to be easily over- 

 looked mth the aid of only a hand lens ; pleurse entirely dull, dorsulum 

 with long conspicuous, whitish hairs along the notauli and where these 

 meet; basal areas on propodeum dull, granular, collar and pleurse 



