NO. 1920. NEW BEES AND ICHNEUMON-FLTES—VIERECK. 617 



ASCOGASTER OLETHREUTI, new species. 



Female. — Lengtli, 4.5 mm.; related to {Clielonus) Ascogaster 

 carpocapsx Viereck from which it maj' be distinguished by tlie black 

 mandibles; the more pointed clypeus; by the antenna? being black or 

 blackish throughout; by the acute lateral projections of the propo- 

 deum, b}'- the intermediate projections being reduced to a carina and 

 by the uniformly black or blackish legs, excepting apex of fore 

 femora and all of fore tibiae, which are more or less dark stramineous; 

 carapace, as in Ascogaster carpocapsse, nearly twice as long as wide 

 in the middle. 



Type-locality. — Pullman, Washington . 



Type.— Cat. No. 14708, U.S.N.M. 



Tlie allotype is from the same locality and essentially the same as 

 the type. The type was reared May 11, 1910, the allotype June 22, 

 1910, and the two male paratopotypes June 11, 1910, and May 11, 

 1910. All of the preceding specimens were labeled, "reared from 

 Oleihreutes ruhipunctarea under temporary Webster No. H. 139," 

 Bureau of Entomology, U. S. Department of Agriculture. One 

 female paratype No. 31 bears a label indicating that it is from Colo- 

 rado and referable to the Baker note No. 633. 



ATANYCOLIDEA, new genus. 



Related to Atanycolus Foerster from which it differs chiefly in 

 having a thorax as in Platyhracon Szepligeti. 

 Type. — Bracon rugosiventris Ashmead. 



CANTHAROCTONUS, new genus. 



Related to Spathius Nees from which it differs chiefly in the non- 

 cubical head, the temples not nearly produced as far as the outside 

 line of the eyes, in the WTll-defined notaidi, in the recurrent vein 

 being received by the first submarginal cell, in the nonangulate hind 

 coxae and in the abdomen being poorly chitinized beyond the first 

 segment. 



Type. — Cantharoctonvs stramineus, new species. 



CANTHAROCTONUS STRAMINEUS, new species. 



Female. — Length, 2.25 mm.; stramineous; head and thorax mostly 

 polished; head darker than thorax; face, including clypeus and 

 mandibles, mostly yellowish; front and vertex ahnost bare, witli a 

 few whitish hairs; ocelli almost equidistant and inclosing a triangidar 

 blackish area, the hind ocelli nearer to each other than to the eye 

 margin; flagel 24-jointed, all joints at least twice as long as thick; 

 wings almost colorless, except for the veins which are infuscated and 

 the stigma which is pale stramineous; coxaj, trochantei-s and base of 



