418 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



clavus with a few scattered blackish punctures, closely whitish pubescent : 

 meinbraue hyaliue, with a large faint cloud near the apex, an obscure 

 smoky spot on the loop of the nervure, and a darker spot exterior to 

 the end of the areole; sometimes with the latter only, or with most of 

 the membrane smoky ; the nervure green. Wings clear hyaline. Ab- 

 domen pale green, more or less tinged with yellow, polished, remotely 

 pubescent. 



Length to tip of abdomen 3 millimeters. Width of prorotum 1^ 

 millimeters. 



Beaten from the wild gooseberry and other bushes in Oear Creek 

 Caiion, August 7. 



The wing-covers are much longer than the body, the coriim long and 

 acutely angular, and the membrane is long and full. Thf male has a 

 broad genital lobe on the left side, which is a little coni^exly arched ^ 

 slightly angular on the upper end and bristly ; next to /'his is a cup- 

 shaped organ, and beneath this a longer, cushioa-shapei piece. Per- 

 haps, when these organs are unrolled, they may show te^h or processes 

 on their inner edges. 



TiNiCEPHALUS Fieber. 

 T. simplex. 



Tinicephalus simpJex Uhler, Fifth Ann. Eep. U. S. Geol. Surv. /)r 1871, 1872, p. 417. 



A neat little green insect, which occurs on various linds of plants in 

 the vicinity of the mountains west of Denver in Ju}' and August. 



It is one of the several forms belonging to )^e Rocky Mountain 

 region, which, while generically diflerent, so clos^ resemble each other 

 as to make it difficult to discriminate the specif*- My materials are at 

 present too incomplete and imperfect to enabJ^ Q^e to designate them 

 all ; but, upon the receipt of clean specimen/of both sexes, it will be 

 comparatively easy to give their true charaqc^istics. 



Sthenakops, new /enus. 



Outline similar to that of Calocoris bim(f^(('ius Hoffg., elongate, almost 

 parallel-sided, with the pronotum sho^ campanulate as seen from 

 above. Head wider than the front off^onotum, incisedly constricted 

 at base, the front almost vertical, and'excepting the tylus and cheeks, 

 nearly square, with the center like /Convex shield, the back part of 

 vertex flattened, and bounded behii/t>y an arched, stout, carina: eyes 

 large, globosely oval, each placed a^ prominent base, a little oblique ; 

 face indented at base of tylus, con^^? contracting interiorly ; the tylus 

 very prominent, curving downw£4 i^^nd backward, the superior cheeks 

 broad, nearly vertical, triangulaO' rounded at tip, the inferior cheeks 

 longer, prominently elevated li/^ ridge, subfusiform. Eostrum short 

 and stout, the basal joint biV^ and compressed, geniculate, a little 

 longer than the head ; throat A^a^e- Antennre long and slender ; the 

 basal joint longer than the hA feebly curved, cylindrical; second very 

 long, of uniform thickness tP^ghout; third thinner and a little shorter; 



