1934] Ants of the Snake River Plains 227 
in a deep canyon near Twin Falls. These were rather small 
and were beneath rocks on moist hillslopes covered with 
bunchgrass (Agropyron sp.). 
37. F. sanguinea subnuda Emery 
Nests of subnuda were found, although rather infre- 
quently, from the southern border of the state northward 
to Boise. The small colonies, in which abounded workers of 
F. fusca subsericea as slaves, were beneath large rocks in 
moist sagebrush areas. 
38. F. sanguinea puberula Emery 
Several small colonies of this ant were observed near 
Nampa, on the sagebrush plains. Many of the adults were 
infected with the fungus, Laboulbenia formicarum Thaxter. 
39. F. oreas comptula Wheeler 
Three nests of this rather uncommon ant were found by 
the writer near Rogerson, beneath large flat rocks on a sage- 
brush-covered hillslope. Winged forms appeared in early 
July. Each of the nests contained two or three beautiful 
golden-yellow queens. 
40. F. lasioides vetula Whir. 
Several colonies of this ant were found at the upper limits 
of the Snake River Plains. The ants live beneath rocks in 
moist areas of abundant vegetation. 
