54 



Studies in Kansas Insects. 



The material in the museum of the University of Kansas has served 

 for the basis of the paper. It has been accumulating through quite a 

 number of years, and at the present time the numbers run well into 

 the thousands of specimens. The entomological division of the Biologi- 

 cal Survey has paid special attention to this group during the past two 

 summers, about five hundred specimens having been collected in the 

 genus Hippiscus alone. The greater bulk of the material comes from 

 western Kansas, for the reason that the systematic survey of the state, 

 started some years ago, has covered that part of the state quite thor- 

 oughly, while the eastern half is as yet not worked. The dry, hot, 

 barren prairies of western Kansas, however, are very rich in this 

 group of grasshoppers and have furnished us with a relatively large 

 number of species. 



In conclusion the writer wishes to thank Prof. S. J. Hunter, under 

 whose direction the work was done, for his many suggestions and 

 criticisms. He is also indebted to Prof. Lawrence Bruner, of the Uni- 

 versity of Nebraska, Mr. Morgan Hebard and J. A. G. Rehn, of the 

 Philadelphia Academy of Science, and Dr. L. O. Howard and A. N. 

 Caudell, of the Bureau of Entomology, for determinations and verifica- 

 tions of some of the more difficult species, and to Miss Ellen Edmonson 

 for making the drawings. Valuable assistance was also given by the 

 members of the Biological Survey party during the summers of 1915 

 and 1916. 



KEY TO SUBFAMILIES OF ACRIDID^E. 



1. Claws without aerolium; pronotum extended over the 

 abdomen Tettigin^e. 



1. Claws furnished with an aerolium; pronotum extending 

 at most over the extreme base of the abdomen (2) 



Page. 



54 



r 



Fin. 1. — Tettigin/E. 



(2) Pig. 



(2) 



