42 Harry Scott Smith 
tirely yellow, following segments with narrow yellow fas- 
CLAR i50 eh cies ee hclpae is. cate erm atpea anal Oresoeelr a eee insolita 
23. Second dorsal segment with a yellow band..... trad states eee 24 
24. Segments of abdomen each with a narrow uniform subap- 
ical yellow band, scarcely widened at the sides; scutellum 
yellow, pestsentellum - black. s,s oo. ¢d.5.7. eee ak ee ae compar 
24. All segments of abdomen not having bands of uniform nar- 
row width; if the scutellum is marked with yellow, the 
postscutellum is also marked with yellow............... 25 
25. Size larger, more robust, length 10 mm.; metathorax with a yel- 
low spot laterally; bands of abdomen more strongly wid- 
ened laterally; yellow mark on clypeus acuminate below, 
pleuralis 
25. Size smaller, 7 mm.; metathorax without yellow spots laterally; 
bands of abdomen not strongly widened laterally......... 26 
26. Basal segment of abdomen more or less red, without yel- 
low aman as 9! r/o ites wadeeriare. foie eke e aa e rufinoda 
26. Basal segment of abdomen black, sometimes with an entire 
pel ayes Teas a. dec Hikes aR orale eet Oe oa ee finitima 
Cerceris venator Cresson. 
1865. Cerceris venator Cresson, Proceedings of the Entomological 
Society of Philadelphia, v, p. 116. 
Numerous specimens taken at Lincoln during the month of 
August on Euphorbia marginata. The ground color of the basal 
abdominal segments of the male is often ferruginous, and rarely 
that of the entire abdomen is of the same color. The amount of 
ferruginous on the female is also quite variable, as I have two 
specimens on which the only black is that of the triangular en- 
closure of the metathorax. The darker specimens have also 
darker wings. The lateral tufts on the apical abdominal segment 
of the male are characteristic of this species. __ 
There is a strong probability that this female is that described 
by Guerin as bicornuta. Should this prove to be the case the lat- 
ter name should be adopted, as it has priority over venator. 
Cerceris flavofasciata, n. sp. 
2. Length about 14 mm. Ground color of insect black, shining. Occiput 
and vertex rather coarsely punctured, cheeks more sparsely so and the 
spaces between the punctures with exceedingly fine ones; a place in front 
of the anterior ocellus and at the sides of the posterior ocelli impunctate, 
shining, space between ocelli with finer punctures; distance between pos- 
terior ocelli about one-half that between them and the inner eye margin; 
364 
