NO. 221G. NEW REARED ICHNEUMON-FLIES— CUSHMAN. 459 



Abdomen subpolished, clothed with very short shining pubescence; 

 first tergite slender, evenly deourvcd, its spiracles in the middle, the 

 dorsal carinae comparatively weak and becoming obsolete far frorn 

 the apex; ovipositor about three-fourths as long as abdomen. 



Black; mandibles and scape below, tegulae, humeral spot, front 

 coxae, and front and middle trochanters yellowish to whitish; hind 

 tibiae and tarsi and apical joint of hind trochanters blackish; legs 

 otherwise stramineous to testaceous, the pale color in front; wings 

 hyaUne; veins and stigma dark, the latter pale at apex. 



Male. — Aside from sexual differences, very like the female and 

 differing principally in the paler color of the mandibles, tegulae, and 

 spot on the scape and the greater extent of the last. 



Host. — Ametastegia glahrata (Fallen). Probably secondary. 



Type-locality. — AVenatchee, Washington. 



Type.—Qa.i. No. 20772, U.S.N.M. 



Described from four females reared by E. J. Newcomer, Bureau of 

 Entomology, April 12, 11, and 14, 1915, the type and paratype a and 

 h (Quaintance No. 11422), and May 12, 1916, paratype c (Quain- 

 tance No. 14020), and one male labeled Vancouver, 2234, Coll. C. F. 

 Baker. 



Allied to pimplae Howard, but easily distinguished by the charac- 

 ters made use of in the key. 



Genus AENOPLEX Foerster. 



The following key includes those North American species that have 

 been referred to this genus and one new species described herewith. 

 It is very likely that a number of other species described in the genus 

 Hemiteles should be referred here. 



lilesoscutum opaque, minutely granulate, at most obscurely punctate in male. . .1. 

 Mesoscutum polished or subopaque with distinct punctures 2. 



1. Propodeum with areola less than half as wide at base as at apex. 



belulaecola Ashmead. 

 Propodeum with areola about two-thirds as wide at base as at apex. 



■plesiotyjms Cuehman. 



2. Mesoscutum subopaque, finely punctured; abdomen entirely black; ovipositor 



nearly as long as abdomen nvjrosoma, new species. 



Mesocutum highly polished; abdomen usually more or less red (frequently en- 

 tirely black in male); ovipositor not nearly as long as abdomen 3. 



3. Propodeum strongly rugose, the rugosity partially obscuring the carinae, the 



petiolar area deeply excavated; coxae black. (Known only from male type.) 



(Alaska) rufipes Ashmead. 



Propodeum weakly sculptured, the carinae distinct, the petiolar area fiat; coxae 

 red 4. 



4. Propodeum nearly perpendicular behind, areola distinctly wider than long; 



abdomen red except petiole, smooth; fiagellum pale brown at base; legs very 



stout. (Known only from female type.) argeae Vierock. 



Propodeum steeply declivous behind, areola about as long as wide; abdomen 

 red only in middle, frequently (especially in male) entirely black, more or less 

 coriaceous; fiagellum entirely black; legs moderate carpocapsae Cushman. 



