LOCUSTIDAE — STENOPELMATINAE 61 



the second. Siibgenital plate of male ample, apically broadly and 

 not deeply emarginate); outer valves of ovipositor serrate above 

 before the apex. .... Gammarotettix Brunner. 



The dominant genus is Ceuthophilus with about sixty species; 

 it is found in every part of the United States and Canada and 

 extends into Mexico (a few species are confined to northern 

 Mexico). The other genera contain each from one to three 

 species, and excepting Hadenoecus, known only from caves and 

 deep wells east of the Mississippi River, occur west of this stream. 

 One species of Udeopsylla has been found a little further east, in 

 Illinois and Manitoba. Gammarotettix is confined to California. 



