414 GEOLOGICAL SURVEY OF THE TEEKITOEIES. 



of tlie first, obfusitbrin ; the apical joints abruptly more slender. Pro- 

 notum trapezoidal, fully twice as wide as long ; the osteolar orifice large; 

 the scale in which it is inserted is subpyriforai in outline. Hemelytra 

 wider posteriorly; the costal margins arcuated and the edge elevated. 



D. hesperia. New species. — Long-ovate, dull black, invested all over 

 with gray, prostrate pubescence. Head long, without the eyes very 

 much narrower than the front of pronotum, obsoletely, minutely 

 wrinkled; the face slanting downward, moderately convex; the occiput 

 having a feeble and very slender carina across its width ; eyes brown ; 

 antennae black ; the basal joint about one-third the length of the second; 

 the second a little longer than the head and pronotum united, gradually 

 thickened from the middle to the tip; the third and fourth much more 

 slender ; the third about one-half the length of the second ; the fourth 

 haidly more than one-half that of the third. Rostrum yellowish-piceous, 

 reaching behind the posterior coxae ; the apical joint very slender and 

 much longer than the third joint; bucculte yellowish. Pronotum a little 

 transverse, moderately convex ; the sides oblique, not carinated, a little 

 arcuated ; the surface minutely wrinkled, densely coated with grayish 

 I)ubescence; the callosities a little convex, defined posteriorly by an 

 imi)ressed line; anterior margin almost straight, fitting very closely 

 against the head, with a feebly defined collum; posterior angles 

 rounded ; the posterior margin a little sinuated. Propleura wrinkled, 

 and, together with the rest of the pectus, densely grayish iDubescent. 

 Legs lurid rufous, minutely pubescent; the coxae, tarsi, and tip of tibae 

 blackish. Scutellum transversely wrinkled, very slightly convex. 

 Hemelytra almost flat, densely scabrous, closely grayish pubescent; the 

 costal margin much elevated, arcuated; the clavus large and wide; mem- 

 brane blackish. Venter black, polished, minutely sericeous pubescent. 



Length to tip of venter, 4^ millimeters. Width across the humeri, 2-^ 

 millimeters. 



Inhabits Colorado and Dakota. 



Fceciloscytus, Fieber. 



1. P. venaticus. New species.— Rather less robust than CharagocMlus 

 Gyllenhali, Fieber. Dull black, closely, minutely, yellowish pubescent. 

 Head black, densely pubescent, face moderately convex ; the cranium 

 with a yellow spot against each eye'; occipital carina slender, sharp. 

 Antennae black, stout, the basal joint extending a little beyond the tip 

 of tylus ; second joint a little stouter at tip, about as long as the prono- 

 tum and scutellum united; the third joint abruptly more slender, about 

 the same length as the basal one; the apical joint subequal to the pre- 

 ceding, and a very little more slender. Pronotum moderately convex, 

 black, minutelv, closely punctured, and obsoletely wrinkled, coated with 

 sparse, yellowfsh pubescence, a little depressed between the callosities; 

 the posterior margin arcuated; the edge yellow ; lateral margin oblique, 

 straight. Pectus black, pubescent, with the posterior and inferior 

 margins slenderly yellow. Legs black, minutely pubescent ; the coxae, 

 base of femora, and basal and middle joint of tarsi yellow. Scutellum 

 a little convex, minutely, transversely wrinkled, coated with yellowish 

 pubescence. Hemelytra longest in the male, black, yellowish pubescent, 

 minutely scabrous, closely punctured ; the cuneus, and sometimes the 

 costal margin, red or yellow; the membrane blackish, with the nervule 

 more or less yellow. Abdomen black, sericeous pubescent; the posterior 

 edges of the" segments sometimes whitish. 



