DESCRIPTIONS OF NEW NORTH AMERICAN 

 ICHNEUMON-FLIES. 



By R. A. CusHMAN. 



Bureau of Ento)nolo(jy, United States Department of Agriculture. 



This paper consists of the descriptions of a new tribe, two new 

 genera, and fourteen new species of ichneumon-flies, together with 

 observations on other forms in the United States National Museum 

 collection. 



Family BRACONIDAE. 



HABROBRACON POLITIVENTRIS, new species. 



In my key to the North American species of Ildbrobracon'^ this 

 species runs to couplet 3. but agrees with neither alternative. From 

 all of the species falling under the characters there given it differs 

 in having the abdomen highly polished. The furrows of the first 

 tergite are crenulate, the triangular area is not punctate at apex, the 

 lateral areas are polished and almost without sculpture. The sec- 

 ond tergite is polished and without sculpture, except in the broad, 

 reticulate impressions setting off the embossed area. 



Female. — Length, 2.25 mm. Face, frons, and vertex shagreened; 

 head behind eyes and ocelli polished, with large, scattered, shallow 

 punctures; antennae 24 jointed, rather long and slender, the flagellar 

 joints much longer than thick; thorax polished, with indistinct, 

 sparse punctures; propodeum polished, faintly shagreened; second 

 abscissa of radius slightly longer than first intercubitus ; abdomen 

 highly polished with lateral areas of first tergite slightly roughened ; 

 grooves of first tergite finely crenulate; embossed area of second ter- 

 gite not especially developed but set off anteriorly by broad, oblique 

 crenulate impressions; ovipositor very short. 



Black; mouth, and inner orbits, the latter including the area about 

 the base of the antennae, and lateral margins of abdomen, yellowish ; 

 femora and trochanters yellowish -testaceous; coxae, tibiae, and tarsi 

 more or less blackish, those of hind legs darkest; wings dusky basally, 

 hyaline apically. 



Host. — Polychrosis viteana demons. 



Type-locality. — North East, Pennsylvania. 



Type.— Cot. No. 21639, U.S.N.M. 



iProc. Ent. Soc. Wash., vol. 16, 1914, p. 100. 



Proceedings U. S. National Museum, Vol. 55— No. 2284. 



517 



