70 NEW NORTH AMERICAN ACRIDID.E — BRUNER. 



black. Posterior tibia? and tarsi yellow, with black spines. Anterior 

 and middle legs mottled and banded with fuscous. Abdomen and un- 

 der side dull whitish yellow or cream-color. Antenna? very markedly 

 annulate. 



Length of body, 2 , 20-23™", 9 , 29-31""" ; of antenna, S , 10.5""", 9, 

 10 1 " 1 "; of pronotum, <$ , 5 mm , $ , G 1 " 1 " ; of teginina, S , 23-25""", 9,29- 

 32 mm ; of bind femora, $ , ll mm , 9 , 13"""; of hind tibia.-, 5,9""", 9,11""". 



Hab. — Fort Beutou, Mont., U. S. National Park, Wyoming, and Lemhi 

 or Salmon River, Idaho (Brunei) ; Alkali Stage Station, Green River, 

 Wyoming (S. H. Scudder). 



The present species is what might well be termed a barren ground 

 locust from its habit of frequenting only desolate alkali flats and the 

 dried-out beds of shallow saline lakes, where it maintains its almost 

 solitary existence upon the few dwarfed and straggling Chenopodiacke 

 that manage to draw a scant sustenance from the strongly impregnated 

 soil. 



Trimerotropis bifasciata sp. nov. 



Having the general appearance of T. pseudofasciata Scudd., and prob- 

 ably that species as determined by Saussure [Prodrom. CEdipod, p. 172]. 

 It differs from it, however, in several important characters. 



Head rather short and broad, eyes wider apart than usual in the 

 genus, not prominent, fastigium bounded by well defined carina 1 and 

 separated from the sulcus of the frontal costa by a A'-shaped carina, the 

 apex of which continues as a median carina that divides the fastigium 

 into two longitudiual furrows that are interrupted about the center by a 

 lateral triangular projection from the front edges of the eyes; pronotum 

 rather short and broad, deeply cut by the last transverse sulcus, anterior 

 lobe tuberculate, rather prominent, glossy, posterior lobe roughly gran- 

 ulose, median carina distinct, twice notched, lateral carina? forming 

 well defined shoulders to posterior lobe, posterior angle obtuse. 



General color ferruginous and ochraceous. 



The tegmina are rather shorter than usual and very distinctly bifasei- 

 ate. The basal fourth dark chocolate brown, darkest at outer edge, and 

 the second band a rather broad one of same color with its inner edge 

 just about the middle of the elytra, and reaching entirely across ; be- 

 yond this the remaining portion is hyaline with a few inconspicuous 

 spots confined to the upper and lower edges, veins and cross-veins dark. 

 Posterior femora with the apex black internally and Drown externally, 

 followed below by a rather broad yellowish- white angulation and below 

 this by one of black, giving it the appearance of that of Eadrottetix 

 trifasciatus. Posterior tibia? with the basal third yellowish and the re- 

 mainder deep plumbeous. Wings with the basal half very light greenish 

 yellow crossed by a rather narrow, interrupted, arcuate, fuliginous baud, 

 with the inner edge about the middle ; beyond this band the wing is hy- 

 aline with dusky nerves and cross-veins. Principal nerves of basal por- 

 tion greenish. 



