80 Harry Scott Smith 
first three and part of fourth segments red; pygidium short, about one and 
one-fourth times long as broad, with a few scattered punctures. Legs 
black, anterior and intermediate tibiae with a line outside, posterior tibiae 
at base and base of tarsi whitish. Wings smoky hyaline. 
3. Unknown. 
Type, Glen, Sioux county, Nebraska, altitude 4,000 ft., August 
13, 1906 (H. S. Smith). This species falls in the subgenus Ho- 
plocrabro Thompson, and is the second one of this group for 
North America, Mr. Viereck, to whom this specimen was sent 
for study, having described the first one from California. 
Crabro interruptus (Lepeletier). 
1834. Solenius interruptus Lepeletier, Annales de la Societe Ento- 
mologique de France, iii, p. 716. 
1895. Crabro interruptus Fox, Transactions of the American Ento-~ 
mological Society, xxii, p. 136. 
Probably our commonest Crabronid. Thirty-six specimens of 
both sexes from Lincoln, Weeping Water, Holt county, West 
Point, Warbonnet canyon, Jim creek, and Glen, from May to 
October. Visits Solidago, Astragalus, and Pastinaca. 
Crabro chrysargyrus Lepeletier. 
1834. Crabro chrysargyrus Lepeletier, Annales de la Societe Ento-~ 
mologique de France, iii, p. 711. 
1895. Crabro chrysarginus Fox, Transactions of the American Ento- 
mological Society, xxii, p. 155. 
This species evidently has quite an extensive range, but is not 
numerous in individuals, being represented in this collection by 
two males, one from Lincoln, in September, the other from the 
opposite end of the state, Warbonnet canyon, on Malvastrum 
(M. Cary). 
Crabro odyneroides Cresson. 
1865. Crabro odyneroides Cresson, Proceedings of the Entomological 
Society of Philadelphia, iv, p. 481. 
1895. Crabro odyneroides Fox, Transactions of the American Ento- 
mological Society, xxii, p. 153. 
An uncommon species. Two examples from Glen, August 20, 
1906, at flowers of Cleome serrulata (H. S. Smith). This species 
is rendered very distinct by the difference in puncturation of the 
first and remaining segments. 
402 
