PSYCHE. 
THE FOSSIL CEROPALIDA OF FLORISSANT, COLORADO. 
BY S. A. ROHWER, BOULDER, COLORADO. 
THERE have been four fossil Ceropalids described by Prof. T. D. A. Cockerell 
from Florissant, and three more are added in this paper. ‘The fossil Ceropalids 
found at Florissant do not seem to be very close to the recent ones found there during 
the summers of 1907 and 1908. ‘The recent ones are small (none of them 10 mm. 
long), mostly black wasps — quite the ordinary kind for the lower Canadian Life 
Zone. The fossil ones, on the other hand, are rather large, robust wasps, like those 
found to-day in the eastern states and Mexico. Some of them (Agenia saxigena, 
Salina florissantensis and 8. scudderz) have the wings with two dark bands, a character 
which is well developed in the species living to-day in Central America and Mexico. 
So far none have been found with very dark wings, a character found in most of the 
large species of United States. 
The following table will separate the Florissant fossil Ceropalids: — 
Abdomen shortly petiolate; (wings clouded beyond the stigma) 
Ceropalites infelix Ckll. 
Abdomen sessile. : ; ile 
1. Second cubital cell on the ‘seis diginetly greater How the third on the same 
nervure; (wings clouded beyond the stigma) . Agenia cockerelle Roh. 
Second cubital cell on the radius not greater than the third . : : 2s 
2. Second cubital cell small, but little more than half as long as the feral on the 
radius; metathorax transversely wrinkled; ferruginous; cloud about the stigma 
not entering the radial cell : : 3 Salius senex Roh. 
Second cubital cell larger; metathorax not eronarerseli wrinkled; head and 
thorax at least black; wings differently marked —. : , 3. 
3. Wings clouded beyond the stigma; large black species . Salius laminarum Roh. 
Wings with an apical cloud; and also a cloud on the basal nervure. ; 4, 
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