438 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Comparative Zoology lias specimens from British Columbia, collected 

 July 14. The genital segment of the male is wider than long, almost 

 gibbous, with the central attachments stout, curved toward each, and 

 the exterior appendages long, slender, and overlapping each other when 

 at rest. A specimen, the original type, was taken at Ogden, Utah, and 

 another by B. H. Smith in the region of Denver. The nymph, from 

 Massachusetts, has the usual 2-jointed tarsi, is broader and relatively 

 flatter than the imago, and much resembles, particularly in the form of 

 the abdomen, the common oriental cockroach. 



8. ;S^. anthracina, new sp. 



Form of the preceding, but still more slender, the pronotum narrower 

 and more convex, and the wing-covers very arched and decurving 

 over the body like the shell of a terrajDin. Deep, coal-black, shining. 

 Head moderately narrow, minutely pubescent; the eyes very large, prom- 

 inent, and oblique; face long, oblique, dull black, rugulose, with the 

 impressed lines faint, and the shield of the vertex obsolete; base of head 

 forming a distinct neck, coarsely shagreened and rugulose, a little flat- 

 tened on top, rounded off posteriorly. Eostrum reaching to the poste- 

 rior coxse, piceous-black, paler at tip. Antennae stout and long; the 

 basal joint long, black, not much thicker and but little shorter than the 

 third ; second about twice as long, yellow, black at base, dusky, and a lit' 

 tie enlarged at tip ; third and fourth dusky, subfusiform, stout, the latter 

 a little shorter than the third. Pronotum like the basal half of a funnel- 

 very narrow anteriorly, sparingly sericeous pubescent, finely, obsoletely 

 punctate and shagreened, the sides anteriorly compressed, the callosi- 

 ties obsolete, the transverse impressed line abbreviated at each end, 

 punctate; the posterior margin concave, with the posterior angles pro- 

 duced, oblique; the lateral submargin a little flattened, coarsely sha- 

 greened, the edge reflexed, turned down anteriorly, and thinning out. 

 Pectoral pieces rugulose in part, deep black. Legs yellow, the coxse 

 black or piceous, with the ends more or less yellow ; anterior femora 

 with a few brown dots, tip of tibioe and last tarsal joint piceous, Scu- 

 tellum coarsely, irregularly rugose, excepting the apex, which is nearly 

 smooth. Hemelytra of almost equal thickness throughout, very con- 

 vexly inflated, and decurving on the sides and posteriorly, slightly pu- 

 bescent, polished, obsoletely, remotely punctate, the punctures of the 

 deep sutures coarse and distinct; the membrane hardly distinct from 

 the corium, the basal thick nervure obsolete. Venter polished, closely 

 golden pubescent. 



Length to tip of venter 4-6 millimeters; to tip of hemelytra 5^-7 

 millimeters. Width of base of pronotum l|-2 millimeters. 



Inhabits York County, Pennsylvania. Collected by the late Dr. F. E. 

 Melsheimer, and by myself in the neighborhood of his farm. 



9. JS. crassicornis, new sp. 



Still more slender than the preceding species, brassy-black, very 

 highly polished, the upper surface with black erect pubescence. 



