ee Harry Scott Smith 
A single specimen of this species was taken at Glen, during 1 th :. 
expedition of August, 1905. 
Chlorion pennsylvanicum (Linnaeus). 
1763. Sphex pennsylvanica Linnaeus, Systema Naturae, 12th edition, 
1, 941, 
1906. ape (Proterosphex) pennsylvanicum H. Fernald, Proceed 
ings of the U. S. National Museum, xxxi, p. 405. 
Ranges across the entire state, but is uncommon in the western 
portion. Specimens have been taken at Glen, West Point, Lin- 
coln, and Union. Flies from June to September. This wasp is 
easily recognized by its large size and matte black color. 
Chlorion ichneumoneum (Linnaeus). oe 
1758. Apis ichneumonea Linnaeus, Systema Naturae, 10th edition, i, p. 
578. 
1906. Chlorion (Proterosphex) ichneumoneum H. Fernald, Proceed- # 
ings of the U. S. National Museum, xxxi, p. 399. 
This beautiful and widely distributed species is found through- — 
out the entire state, the collection containing specimens from — 
Glen, Warbonnet canyon, Carns, West Point, Lincoln, and Union, — 
Flies from June to August. Visits flowers of Petalostemon, — 
Melilotus, and Euphorbia. 
Family STIZIDAE 
KEY TO THE GENERA 
Marginal cell much shorter than the first cubital; spurs of hind tibiae 
short in both sexes, not enlarged; no pygidium, at the most with 
‘two short ridges on each side of apical portion of last dorsal ab- 
dominal segment; abdomen of the male with three spines at 
DOR fo vac uciekc 2 bin ns i eR Det Se ae a eee ee Stizus 
Marginal cell about twice as long as first cubital; spurs of hind tibiae 
enlarged in the female, and the pygidium well developed; abdo- 
: f : . a7 
men of the male with a single spine at apex.............+.. Sphecius a 
Genus Stizus Latreille ‘ 
J 
Stizus unicinctus Say. a 
1823. Stizus unicinctus Say, Western Quarterly Reporter, ii, p. 77. 4 
1895. Stizus unicinctus Fox, Proceedings of Academy of Nan =4 
Sciences of Philadelphia, p. 268. x 
Rather common throughout the entire state. Sioux county, — . 
Pine Bluffs, Carns, Trenton, and Lincoln, during July and Au- | 
my 
334 
