OK THOP TERA. 1 05 



Sub-family III. EREMOBIN^:.* 



This sub-family includes large, plump species, with the general 

 appearance of members of the CEdipodinae. They can be distin- 

 guished from the preceding sub-family by the presence of the ter- 

 minal spine of the outer row of the posterior tibiae (Fig. 940); also 

 by the presence of a rough plate on the side of the second abdominal 

 segment (Fig. 95). The vertex is usually broad, flat, or concave, and 



I 



FIG. 94. Legs of Locusts. FIG. 95. First abdominal segment of Ertmobia. 



ugly declivous ; it is then suddenly narrowed and falls off verti- 

 cally to the plain of the antennae. In this place it forms a part ap- 

 parently of the frontal costa, from which it is separated anatomically 

 by a little transverse ridge. Below this ridge lies the middle ocellus. 

 The eyes are relatively small, and widely separated by the broad 

 vert 



This sub-family is represented in our fauna by / 

 from Arizona. 



Sub-family IV.ACRIDIN^:. 



Of the series of sub-families of Locusts in which the prostermim 

 is armed, re :i\es of but two ha\ 1 in 



our fauna. To the first of these, tin- Acridinnj, beloi C of 



our most common and at the same time some of the most in. 

 In tl. unily the head : and is mm. 



at the union of tin .ml front. The front is slight' 



filiform; and the terminal spine of til 

 TOW of tli lly want 



This sub-family is repres, nted by many forms in this mtintry. 

 Only those ' at tent; 



; e can be determn Uy by means of 



' 



* ErcmnMn.T. ErimObia: I, a desert; bkrf (ftiow). t> 



