222 The American Naturalist. [March, 



October. It is a large wingless insect with a great yellow 

 head, powerful jaws, and a banded abdomen. I first saw it in 

 eastern Idaho in October, 1872, and found it common from 

 Shoshone Falls and Lewis Ferry to the head waters of Brun- 

 eau River in October, 1890. It lives in burrows in the sage 

 plains and its holes resemble those of the small pocket mice 

 (Perognathus olivaceus) in being clean cut, going straight 

 down at first, and having no mound at the opening. In 

 crossing the plains during cold stormy weather the heads of 

 these curious animals were often seen at the mouths of their 

 burrows and many were met with walking about among the 

 sagebrush. They walk much, with seeming dignity and 

 deliberation, and their tracks may be seen in every direction. 

 If two are held together they immediately bite off one 

 another's legs and inflict other Serious wounds. — From AnimcH 

 Life. 



