The Sphegoidea of Nebraska 45 
suffused with reddish, tarsi dusky; flagellum fulvous beneath. Wings 
subhyaline, vicinity of marginal cell strongly clouded. 
6. Length 9-10 mm. Does not differ essentially from the female. 
The clypeus is not quite so prominent, one specimen has a yellow spot 
back of tubercles, the spots on the scutellum are smaller, the postscutellum 
is yellow, the spots on the metathorax are farther down and larger, the 
band on the third segment is produced gradually at the sides instead of 
suddenly, the sixth segment has a yellow band, the seventh has a minute 
dot on each side, and ventral segments 1-5 have a small yellow lateral spot. 
The male lacks the pleural spine. 
Type female, Rock ‘county, Nebraska, July 22, 1902, on Heli- 
anthus sp. (W. D. Pierce) ; type male, Glen, Sioux county, Ne- 
braska, altitude 4,000 ft., August 19, 1906 (P. R. Jones) ; male 
paratype, Lincoln, Nebraska, August. 
This species is apparently related to compacta, which I have 
not seen, but differs in size, sculpture of metathorax, and mark- 
ings. The spine on the pleuron of the female is probably not of 
very much taxonomic value, as in compar, where it is sometimes 
present and sometimes wanting. 
Cerceris deserta Say. 
1824. Cerceris deserta Say, Long’s Expedition, ii, Appendix, p. 344. 
1852. Cerceris deserta Say, Leconte edition, ii, p. 232. 
1865. Cerceris deserta Cresson, Proceedings of the Entomological Ue 
ciety of Philadelphia, v, p. 125. 
Ranges across the entire state, specimens having been taken at 
Glen, Sandhills, and West Point, July and August (P. R. Jones, 
H. S. Smith), also at Lincoln. So far only the male has been 
captured. 
Cerceris imitatoria Schletterer. 
1865. Cerceris imitator Cresson, Proceedings of the Entomological 
Society of Philadelphia, v, p. 125 (not of F. Smith). 
1887. Cerceris imitatoria Schletterer, Zoologische Jahrbiicher, ii, p. 494. 
Lincoln, August, a single female. Packard unites this species 
with deserta, but I prefer to consider it a distinct species. It 
differs in the sculpture of the metathorax, having the basal en- 
closure quite strongly striated, whereas in the above it is almost 
without striations. The legs also have much more black. 
Cerceris vicina Cresson. 
1865. Cerceris vicina Cresson, Baceioiees of the Entomological So- 
ciety of Philadelphia, v, p. 120. 
367 
