174 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Sepsis astutis, n. sp. 



Male and female : Head black, shining ; besides a pair of 

 ocellar bristles there are two pairs of verticals : antennae yellow- 

 ish, apex of third joint obscure, second joint with a bristle 

 above ; face, mouth-parts, cheeks and lower part of occiput 

 yellowish ; besides the vibrissir there are two bristles on each 

 side of the mouth. Thorax black ; mesonotum subopaque, one 

 humeral, one posthuraeral, one supraalar, and two dorsocentral 

 bristles ; pleura^ shining, sometimes with a yellowish cast above, 

 with a grayish vitta above coxiie, one mesopleural bristle 

 present; scutellum subopaque black, with an apical pair of 

 bristles ; halteres yellow. Front legs yellow, their femora with 

 the usual tubercle beneath, upon which are situated four short 

 black spines, and proximad to which is a single strong spine, 

 the tibia? with a small swelling on under side near base, bear- 

 ing a few black bristles ; the middle and hind legs shining 

 black, with the cox?p, knees, apices of tibiae, and tarsi, except 

 their tips, yellowish, middle tibia^ with two short bristles on 

 inner side just beyond middle, hind femora with one bristle on 

 outer side near base of apical third, hind tibiae also with one 

 bristle on posterior margin near base of apical third. Abdomen 

 shining black, third, fourth and fifth segments each with a pair 

 of submarginal bristles. Wings hyaline, without apical spot, 

 the large vein giving rise to the first, second and third veins 

 enlarged and bordered with brown. Length, 2.7 mm. 



Fourteen specimens; February, April, and May.  



Sepsis delectabilis, n. sp. 



Male: Head shining; front reddish brown, triangle and up- 

 per part of occiput black, a shallow median sulcus from tip of 

 triangle to antenna?, with ocellar, two pairs of verticals, and a 

 pair of small bristles behind ocelli present ; antenna? reddish 

 yellow, fuscous on upper edge ; face, cheeks, mouth-parts, and 

 lower part of occiput yellow, two bristles below vibrissao. 

 Thorax black ; mesonotum largely on the sides, scutellum 

 largely, and plurae, shining yellow ; dorsum of mesonotum sub- 

 opaque, one humeral, two posthumeral, one supraalar, and 

 twodorsocentrals on each side ; scutellum with an apical pair of 

 bristles, and one mesopleural bristle present ; a grayish pol- 

 linose vitta above middle coxa^ ; halteres yellow. Abdomen 



