242 ENTOMOLOGICAL NEWS. p june; “12 
sentation of Hymenoptera and offer excellent facilities for the 
study of their habits. As the region in question is practically 
devoid of trees, excepting in some of the richer bottom lands, 
ground-dwelling bees, wasps and ants are abundant, while 
wood-borers in this order of insects are rather sparingly rep- 
resented, and necessarily largely restricted to the margins of 
streams. 
We have derived much information from Peckhams’ 
“Wasps, Solitary and Social” (1905), and “The Instincts and 
Habits of Solitary Wasps” (Madison, Wis., 1898), and Cam- 
bridge Natural History Vol. VI, Insects, as well as from other 
publications. 
Most of the species collected were readily identified by means 
of the Snow Entomological Collections ; doubtful cases of iden- 
tification and those which could not be determined by us were 
submitted to specialists. 
The photographs were taken by Professor P. A. Glenn, of 
the Department of Entomology here, and the drawings, made 
by the joint authors. 
Series HETEROGYNA 
Family MyrMICIDAE 
Pogonomyrmex occidentalis Cress. (Myrmica), Proc. Ent. Soc. 
Phil. IV, 426, 1865. 
The ‘Mound-Building Prairie Ant.” The hills of this spe- 
cies are familiar objects in Central and Western Kansas and 
elsewhere on the “Great Plains;” the larger cleared areas in 
which they are located make such settlements very conspicuous 
to the traveler. 
The covering of the mound depends largely upon the sur- 
rounding material, for although they are usually covered with 
small pebbles or gravel, in the vicinity of railroads cinders are 
largely employed, giving the nest a black appearance. 
Mr. George A. Dean, of the Kansas Agricultural College, at 
Manhattan, has published his interesting observations in Kan- 
sas on this species of ant.* 
*Trans. Kansas Acad. Science XIX, pp. 164-170, 1903-04. 
