Sphecoidea of Nebraska 65 
Crabro (subgenus?) Stygius (Mickel). 
1916. Thyreopus stygius Mickel, Trans. Amer. Ent. Soc., XLII, p. 
422. 
Females 1: Bad Lands at the Mouth of Monroe Canyon, May 
28, 1901 (L. Bruner) ; visits flowers of Astragalus sp. 
Crabro (Thyreopus) vicinus Cresson. 
1865. Crabro vicinus Cresson, Proc. Ent. Soc. Phil., 1V, p. 479. 
1895. Crabro vicinus Fox, Trans. Amer. Ent. Soc., XXII, p. 170. 
Females 4: Mitchell (1), Warbonnet Canyon (1) and Sioux 
county (2); Mitchell specimen taken June 23, 1914 (L. M. 
Gates). 
Crabro (Thyreopus) argus (Packard). 
1867. Thyreopus argus Packard, Proc. Ent. Soc. Phil., V1, p. 359. 
1895. Crabro argus Fox, Trans. Amer. Ent. Soc., XXII, p. 165. 
Males 1: Glen, August 12, 1906 (P. R. Jones) ; visits flowers 
of Cleome sp. 
Crabro (Thyreopus) latipes F.. Smith. 
1856. Crabro latipes F. Smith, Cat. Hym. Brit. Mus., IV., p. 396. 
1895. Crabro latipes Fox, Trans. Amer. Ent. Soc., XXII, p. 169. 
Males 2: Lincoln (1) and Warbonnet Canyon (1). 
Crabro (Thyreopus) largior Fox. 
1895. Crabro largior Fox, Trans. Amer. Ent. Soc., XXII, p. 161. 
Males 2, females 4: Lincoln (1), Monroe Canyon (1) and 
Warbonnet Canyon (4); June 8 to August 3; visits flowers of 
Astragalus sp. 
Crabro (Thyreopus) pleuralis Fox. 
1895. Crabro pleuralis Fox, Trans. Amer. Ent. Soc., XXII, p. 162. | 
Males 2: Monroe Canyon, August 16, 1912 (R. W. Dawson), 
and Warbonnet Canyon. 
Crabro (Synothyreopus) tumidus (Packard). 
1867. Thyreopus tumidus Packard, Proc. Ent. Soc. Phil., VI, p. 364. 
1895. Crabro tumidus Fox, Trans. Amer. Ent. Soc., XXII, p. 175. 
Males 3, females 2: Omaha (5) ; August 17 to September 8; 
visits flowers of Solidago canadensis. 
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