ART. IG WASPS OF THE SUBFAMILY BRACONINAE MUESEBECK 41 



that narrows to a point at each end; mesopleural furrow weakly 

 impressed, pohshed; spurs of hind tibia of about equal length and 

 less than half as long as the basitarsus; areolet triangular, petiolate; 

 first abscissa of mediella a little shorter than the second ; abdomen 

 smooth and polished; the first tergite with two prominent dorsal 

 longitudinal keels; second and third tergites broad, with more or 

 less distinct transverse impressions; ovipositor sheaths nearly as 

 long as the body. Head black; thorax ferruginous, usually with the 

 collar, lower part of propleura, and the pro and meso pectus black; 

 all legs completely black; wings rather strongly infumated; abdo- 

 men entirely red. 



These notes are based on only a small number of specimens: The 

 type, which is from Colorado, and seven specimens in the National 

 Museum from Colorado and New Mexico. Additional material 

 may show a wider range of variations than has been indicated. 



14. BASSUS NIGRIPES (Cresson) 



Agathis nigripes Cresson, Proc. Ent. Soc. Phila., vol. 4, 1865, p. 297. 

 Agathis nigriceps Provancher, Natural. Canad., vol. 22, 1895, p. 96. 

 Agathis wyomingensis Viereck, Trans. Kans. Acad. Sci., vol. 19, 1905, p. 284. 



Type. — The type of nigripes is in the Philadelphia Academy of 

 Science; that of nigriceps is in the Museum of Pubhc Instruction in 

 Quebec, Canada; and that oi wyomiiigensis is in the University of 

 Kansas. 



Although I have not seen the type of nigriceps Provancher, the 

 orignal description and notes on the type made by S. A. Rohwer 

 leave no reasonable doubt that it is nigripes Cresson. The type of 

 wyomingensis, which I have studied, is certainly conspecific with that 

 of nigripes in my opinion. 



The species is exceedingly close to atripes, but is undoubtedly 

 distinct and separable on the basis of the characters mentioned in 

 the discussion of atripes. 



Head characters essentially the same as in atripes, except as noted 

 in the key; the antennae are distinctly shorter, very slender, and 

 not tapering to the apex, the apical segments of the female antennae 

 shortened; parapsidal furrows wanting, the mesonotal lobes not 

 defined; propodeum mostly smooth and polished, with a long nari'ow 

 median area that narrows at both ends; basal lateral areas usually 

 weakly defined; apical lateral areas rarely indicated; mesopleural 

 furrow shallow, polished; second cubital cell triangular, petiolate; 

 abdomen polished, the first tergite with two prominent dorsal longi- 

 tudinal keels extending to the middle or beyond; ovipositor sheaths 

 nearl}^ as long as the body. Head black, the temples and cheeks 

 and part of the face sometimes more or less ferruginous; thorax 

 yellowish ferruginous, Avith the pro and meso pectus and part of the 

 3015—27 i 



