242 ENTOMOLOGICAL NEWS. [June, 'l2 



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. 



