SCUDDER. — THE GENUS DEROTMEMA. 393 



■was meant. I have specimens from Humboldt Station, Nevada, Green 

 River, July 21-31, and Alkali. Wyo., July 27 ; Salt Lake Valley, Utah, 

 Aug. 1-4, and White River, Col., next the Utah border, July 24-Aug. 3, 

 all but the first taken by myself. I consider this, rather than either of 

 the following, to be the species described by Saussure, principally from 

 the wider angle of the hind border of the pronotum, and the band of the 

 wiugs more noticeably broken at its crossing by the veins. 



7. Derotmema lentiginosum, sp. nov. . 



Of relatively large size, fusco-testaceous, much flecked with fuscous. 

 Head not very prominent, much infuscated above the clypeus, the 

 fastigium of vertex deeply channelled between high walls which gradually 

 approximate both in front and behind, and with a distinct median 

 carina ; frontal costa relatively narrow, subequal but gently expanding 

 at base, sulcate throughout, its margins continuous with the walls of the 

 fastigium; eyes only modei'ately prominent; ant?enn£e scarcely so long 

 as (S) or much shorter than ( 9 ) the hind femora, ferrugineo-testaceous, 

 very obscurely banded with fuscous. Pronotum ferrugineo-fuscous, 

 flecked with fuscous and especially marked on the lateral lobes 

 with a broad fuscous bar, darkest below, inclosing a narrow one of 

 testaceous, the lateral carinte sharp and distinct on the metazona, the 

 disk of which is rather delicately rugnloso-tuberculate with a slight 

 pectinate appearance, its hind margin rectangiilate or in the male some- 

 times slightly acutangulate. Tegraina shaped as in Triraerotropis, with 

 arched costa, cinereo-fuscous, with nearly uniformly distributed rather 

 coarse fuscous fleckings, sometimes obscurely grouped into patches near 

 the base and middle, rarely very obscurely streaked longitudinally in the 

 apical half, the intercalary vein approaching the median much more 

 closely than the ulnar vein ; wings broad and full in the radiate area, 

 somewhat after the manner of Circotettix, being about three fifths as 

 broad as long ; they are very pale citron at base, apically hyaline but 

 with nearly all the veins and cross-veins irregularly infuscated, and with 

 a moderately narrow generally unequal and percurrent but more or less 

 interrupted extramesial fuscous band, narrowest just below the axillary 

 area, and in the latter sending an offshoot half way to the base. Hind 

 femora ferrugineo-testaceous, rather obscurely fasciate with fuscous. 



Length of body, ^, 19.5 mm., 9, 25 mm. ; antenna?, ^ , 9 mm., 9> 

 8.5 mm,; tegmina, ^, 23 mm., 9? 26 mm. ; hind femora, ^, 10 mm., 

 9 , 12 mm. 



