NO. 2334. NORTH AMKUIVAN ICHNEUMON-FLIES— CUSHMAN. 280 



Family BRACONIDAE. 



BASSUS ACKOBASIDIS, new species. 



Female. — Length, 6 mm. ; ovipositor, 4 mm. 



Head polished, impunctate, in front view wider by the width of 

 one eye than long; face nearly a half wider than greatest diameter 

 of eye, rather densety pilose; eyes parallel within; malar space two- 

 thirds as long as eye; clypeus trmicate, labrum exposed to about 

 the length of clypeus; thorax polished, pilose, especially on pleura 

 and propodeum; posterior margins of pronotum and mesopleurum 

 and metapleural furrow foveolate; notauli weak anteriorly, but deep 

 for a short distance before their junction; fovea between scutellum 

 and mesoscutum finely foveolate; legs stout, hind femur more than 

 a third as deep as long; abdomen polished, equal in length to head 

 and thorax together; first tergite as broad at apex as long, with 

 dorsal carinae strong and parallel basally, becoming obsolete and 

 divergent toward apex, the segment longitudinally rugulose beyond 

 middle, polished medially at apex; second tergite with deep trans- 

 verse gastrocoeli, longitudinally aciculate at sides; suturiform 

 articulation, apex of third tergite, and groove across fourth tergite 

 finely foveolate; ovipositor two-thirds as long as body. 



Head, antennae, front and middle legs, and thorax except prono- 

 tum, metapleura, and propodeum black; (the red pronotum is very 

 unusual in the group to which this species belongs and in this case 

 is probably due to immaturity)'; excepted portions of thorax, hind 

 legs (except apices of tibiae and tarsi, wiiich are black), and abdomen 

 red; wings dark infumate. 



Afale. — Practically identical with female but normal in thoracic 

 coloration. 



As is usual in this genus there is great variation in sculpture. All 

 the furrows and sutures mentioned above as foveolate vary from 

 strongly so to practically smooth. This is especially true of those on 

 the abdomen. The propodeum varies from practically smooth with 

 sparse punctures to strongly, irregularly rugulose, the rugae some- 

 times arranged to form rather distinct areolation. The hind tibia 

 in the male is sometimes very largely fuscous, paler in the middle and 

 at base. 



Host. — Acrohasis, species on pecan; Acrohasis caryaevorclla. 



Type locality.— Brownwood, Texas. 



Other localities. — ^Pecan Bayou, Glen Rose, and College Station, 

 Texas. 



Type.— Csit. No. 22867, U.S.N.M. 



'Since this description was written more specimens have been received from both Mr. Bilsing and Mr ■ 

 Fabis. Of the 13 new specimens only one female has the pronotum red. 



181404— 21— Proc.N.M. vol. 58 19 



