12 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.60. 



This species wjis referred by Davis in the index to his review of 

 the Tryphoninae^ to the Cryptinae without indicating the genus to 

 which he would refer it. 



NELiOPISTHUS NIGER, new spscies. 



Female. — Length, 5 mm. 



In my key to females of North American species ® runs to 7iigri- 

 dorsu7ii Cushman, agreeing with all of the characters except that the 

 ovipositor is but little longer than the first tergite. It differs further 

 from nigridorsum in having the thorax entirely without red laterally. 

 Its much broader abdomen as well as its black thorax at once dis- 

 tinguish it from ^e72.5«^w5 (Say) (=5^V7^^?^5 Cushman). From luggeri 

 (Ashmead), to which it is very closely allied structurally, it differs 

 in addition to the color in having the nervellus broken higher (at 

 about the lower third) and in having the postpetiole medially with 

 a deep impression. The male of luggeri, which is black, can be dis- 

 tinguished from nige7' by the structural characters. 



In structure much as in luggeri, with exceptions noted above and 

 with areola distinctly transversely rugose. 



Black with the usual pattern of white somewhat less extensive 

 on the face; narrow apical margins of tergites and scutellum reddish; 

 annulus of antenna incomplete and occupying only two joints; legs 

 darker throughout Avith middle coxa at base, hind coxa entirely, 

 and their trochanters partly piceous to black; hind femur at base, 

 tibia dorsally, and tarsus infuscate. 



Type locality. — Florissant, Colorado. 



Type.—C2X. No. 24620, U.S.N.M. 



One female taken June 21, 1908, by S. A. Rohwer, 



BOETHUS NIGRIPENNIS, new species. 



Very distinct from all other North American species in size and 

 color. 



Female. — Length, 8.0 mm. ; antennae, 7.0 mm. 



Entire body and legs smooth and polished, clothed with short 

 silky pubescence especially dense on face propodeum and first tergite, 

 which are almost velvety. 



Head in front view wider than long; face broader than height 

 of eye; malar space more than half as long as basal width of 

 mandible; clypeus about half as long as interfoveal line; eyes par- 

 allel within; antennae rather stout, the flagellum with about 30 

 joints; mesopleurum entirely without trace of punctiform fovea 

 near posterior margin ; radial cell measured on metacarpus barely as 



'Trans. Amer. Ent. Soc, vol. 24, 1897, p. 346. 

 •Proc. U. S. Nat. Mus., vol. 56, 1919, p. 379. 



