The Sphegoidea of Nebraska 59 
1893. Tachysphex acutus Fox, Proceedings of the Academy of Natural 
Sciences of Philadelphia, p. 521. 
A single specimen from Lincoln is labeled with the above name, 
but the abdomen is missing, so that I am unable to verify the de- 
termination. It should not be considered as absolutely authentic, 
as it has never been recorded from the west to my knowledge. 
Tachysphex minimus (Fox). 
1892. Tachytes minimus Fox, Transactions of the American Ento- 
mological Society, xix, p. 248. 
1893. Tachysphex minimus Fox, Proceedings of the Academy of Nat- 
ural Sciences of Philadelphia, p. 532. 
Thus far taken only at West Point, during June (L. Bruner). 
Some of the specimens have the abdomen entirely black, and 
others have the basal segment red as in mundus. 
Tachysphex tarsatus (Say). 
1823. Larra tarsata Say, Western Quarterly Reporter, ii, p. 78. 
1859. Larra tarsata Say, Leconte edition, i, p. 166. 
1893. Tachysphex tarsatus Fox, Proceedings of the Academy of Nat- 
ural Sciences of Philadelphia, p. 512. 
West Point, Glen, and Warbonnet canyon, June to August. 
Tachysphex semirufus (Cresson). 
1865. Larrada semirufa Cresson, Proceedings of the Entomological 
Society of Philadelphia, iv, p. 464. 
1893. Tachysphex semirufus Fox, Proceedings of the Academy of 
Natural Sciences of Philadelphia, p. 515. 
Northwest corner of the state only. Bad Lands, at mouth of 
Monroe canyon in Sioux county, May, on Astragalus sp. (L. 
Bruner). 
Tachysphex puncticeps, new name. Z 
1906. Tachysphex punctulatus H. S. Smith, Entomological News, xvii, 
p. 246 (not of Kohl). 
The type specimen, taken in Sioux county, in May. 
Tachysphex belfragei (Cresson). 
1872. Larrada Belfragei Cresson, Transactions of the American En- 
tomological Society, iv, p. 215. 
1893. Tachysphex Belfragei Fox, Proceedings of the Academy of Nat- 
ural Sciences of Philadelphia, p. 509. 
Two females, Lincoln, during July and August, on Euphorbia. 
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