64 Clarence E. Mickel 
The latter specimen has been collected since the species was 
described. 
Crabro (Stenocrabro) planipes Fox. 
1895. Crabro planipes Fox, Trans. Amer. Ent. Soc., XXII, p. 193. 
Males 1: Lincoln, May 16, 1908. 
Crabro (Crossocerus) lentus Fox. 
1895. Crabro lentus Fox, Trans. Amer. Ent. Soc., XXII, p. 190. 
Females 5: Omaha (3), Lincoln (1) and West Point (1) ; 
June 20 to August 28. 
Crabro (Crossocerus) scutellifer Dalle Torre. 
1824. Crabro scutellatus Say, Long’s Expedition, 1], App., p. 341 (nec 
Scheven). 
1895. Crabro scutellatus Fox, Trans. Amer. Ent. Soc., XXII, p. 190. 
Females 2: Glen (2); August 13, 1906 (H. S. Smith). 
Crabro (Crossocerus) minimus (Packard). 
1867. Blepharipus minimus Packard, Proc. Ent. Soc. Phil., V1, p. 377. 
1895. Crabro minimum Fox, Trans. Amer. Ent. Soc., XXII, p. 188. 
Females 2: Omaha (2) ; August 17, 1913, and August 25, 1914 
(L. T. Williams) ; visits flowers of Solidago canadensis. 
Crabro (Crossocerus) incavus Fox. 
1895. Crabro incavus Fox, Trans. Amer. Ent. Soc., XXII, p. 188. 
Females 1: West Point. 
Crabro (Blepharipus) nigricornis (Provancher). 
1888. Blepharipus nigricornis Provancher, Add. Hym. Quebec, p. 294. 
1895. Crabro nigricornis Fox, Trans. Amer. Ent. Soc., XXII, p. 195. 
Females 2: Monroe Canyon (2); June 30, 1911, and August 
19, 1912 (R. W. Dawson). 
Crabro (Blepharipus) impressifrons F. Smith. 
1824. Crabro tibialis Say, Long’s Second Expedition, App., p. 340 (nec 
Fabricius). 
1856. Crabro impressifrons F. Smith, Cat. Hym. Brit. Mus., IV, p. 
417. 
1895. Crabro impressifrons Fox, Trans. Amer. Ent. Soc., XXII, p. 
194. 
Males 1, females 1: Omaha (1) and Falls City (1); August 
20, 1913 (L. T. Williams), and April 28, 1904 (M. H. Swenk). 
382 
