894 PROCEEDINGS OF THE AMERICAN ACADEMY. 



10 (?, 2 9 . South Park, Col., Aug. 11-16; Garland, Col., Aug. 28- 

 29, collected by myself. 



8. Derotmema lichenosum, sp. uov. 



Of relatively large size, fusco-ciuereous, much marked with fuscous 

 and ferruginous. Head not very prominent, the face much mottled with 

 cinereous and fuscous, generally darker above the clypeus, the fastigium 

 and frontal costa much as in the last species ; eyes only moderately 

 prominent even in the male; antennae about as long as {^) or much 

 shorter than (?) the hind femora, ferruginous, distinctly banded with 

 fuscous. Pronotum cinereo-fuscous, often flecked or blotched with bright 

 ferruginous (simulating the rusty lichens of the sage-brush) on the disk, 

 the lateral lobes with markings similar to those of the last species ; 

 lateral carinas sharp and distinct, at least on the metazona, the disk of 

 which is granuloso-rugose, its posterior margin rectangulate, rarely 

 feebly obtusangulate. Tegmina shaped as in Trimerotropis, with arched 

 costa, cinereous, marked with fuscous nearly uniformly distributed in 

 slender streaks and patches, showing a decided longitudinal tendency, 

 especially in the distal three fourths where they follow interruptedly the 

 course of the longitudinal veins ; occasionally an obscure tendency is 

 seen to their grouping basally, as common in Trimerotropis ; the inter- 

 calary vein approaches the median much more closely than it does the 

 ulnar vein ; wings marked quite as in the last species, the bund as there 

 reaching the hind margin but not the anal angle, and leaving three lobes 

 of the radiate area free ; but they are of the normal form, not full in the 

 radiate area and rarely more than four sevenths as broad as long. 

 Hind femora cinereo-testaceous, rather obscurely fasciate with fuscous. 



Length of body, ^, 21 mm., ?, 26.5 mm.; antennoe, ^, 10.5 mm., 

 9, 10 mm.; tegmina, J' , 24 mm., 9; 28.25 mm.; hind femora, ^, 

 10.75 mm., 9, 13 mm. 



40 (?, 14 9. Alkali, Wyo., July 27 ; Green River, Wyo., July 21- 

 31 ; between Green River and Evanston, Wyo., July 31 ; Evanston, 

 Wyo., Aug. 6; Fossil, Wyo., Sept. 2; Castle Gate, Utah, Aug. 22; 

 White River, Col., at the Utah border, July 24- Aug. 13 ; Florissant, 

 Col., Aug. 17-22; South Park, Col., Aug. 11-16; Garland, Col., 

 Aug. 28-29, all collected by myself. 



The species was much more common in the northern of these localities 

 than in the southern, and was found on and about the sage-brush, its 

 colors rendering it most inconspicuous and sometimes showing, especiidly 

 upon the thorax and occasionally upon the head, rusty patches quite 



