ART. 16 WASPS OF THE SUBFAMILY BRACONINaE MUESEBECK 33 



long as middle basitarsus; inner spur of hind tibia slightly less than 

 half the posterior basitarsus, which is distinctly longer than the remain- 

 ing segments of hind tarsi combined ; radius arising from a little beyond 

 middle of stigma; areolet large, sub triangular, sessile; first abscissa 

 of mediella considerably shorter than the second; abdomen very 

 slender, narrower than thorax, completely polished; first tergite long 

 and narrow, nearly twice as long as broad at apex; the basal im- 

 pression on first tergite not completely margined and the median 

 elevation behind this impression short and not prominent, not devel- 

 oped into a sharp keel; second tergite about as long as broad at apex; 

 ovipositor sheaths considerably longer than the body; hypopygium 

 very slightly surpassing apex of last dorsal segment. Head entirely 

 black ; thorax yellow-ferruginous, except the propectus which is black ; 

 anterior and middle legs black, posterior coxae and femora red, their 

 trochanters, tibia, and tarsi black; wings strongly infumated; abdo- 

 men yellowish ferruginous. 



The foregoing notes are based on the type, the only known speci- 

 men, which is from Douglas County, Kansas. 



4. BASSUS IMITATUS (Cresson) 



Microdus imitatus Cresson, Canad. Ent., vol. 5, 1873, p. 51. 



Type. — No. 1721, Academy of Natural Sciences, Philadelphia, 

 Pennsylvania. 



Very similar to nigrotrochantericus as noted under that species. 

 In addition to the differences included in the key, the type of imitatus, 

 which is the only specimen of this species that I have seen, differs from 

 nigrotrochantericus in the more extensive black markings of the thorax. 

 The prothorax is entirely black, and the sutures surrounding the 

 scutellum and the mesopectus are black. This coloration, however, 

 doubtless varies more or less. The species can at once be separated 

 from sanctus by the decidedly more slender thorax and abdomen, the 

 considerably longer ovipositor, the weaker sculpture of the propodeum, 

 and the ferruginous mesonotum and mesopleura. The antennae are 

 41-segmented in the type and apparently taper less strongly than in 

 sanctus. 



Recorded only from Massachusetts. 



5. BASSUS TEXANUS (Cresson) 



Microdus texanus Cresson, Trans. Amer. Ent. Soc, vol. 4, 1872, p. 181. 



Type. — No. 1723, Academy of Natural Sciences, Philadelphia, 

 Pennsylvania. 



This species is very similar to sanctus, but can be rather easily 

 separated by the longer tibial spurs and the shorter ovipositor. The 

 thorax in general is more compact, appearing shorter and distinctly 

 3015—27 3 



