388 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



3. P. discrepans^ new sp. 



Broader, and more quadrate than either of the preceding species, the 

 corium longer, and the membrane much smaller and shorter. Deep 

 black, highly polished; the head transverse, blunt, broadly rounded, 

 remotely ciliate ; the surface flat, broadly depressed each side, rugose, 

 unevenly i)unctured and obsoletely wrinkled; the pits next each eye pres- 

 ent, the others obsolete ; anterior margin broadly reflexed, emarginated 

 more or less distinctly in front, the lateral lobes curving in front of the 

 tylus, the tylus tapering at tip; base of head a little convexly elevated, 

 roughened each side ; the ocelli dark, minute, and placed very far back. 

 Antennae piceous at base, pale ocherous from the tip of the third joint 

 to the tip : second joint slender, much longer than the third ; the third 

 shortest, increasing in thickness toward the tip ; the fourth and fifth 

 long-ovate, the fourth longer than the fifth, and subequal to the second. 

 Bucculse a little shorter than the head, a little arched, punctate, and rugu- 

 lose, inclosing the basal joint of the rostrum. Second joint of rostrum 

 long, subequal to the third, very much compressed, arched, widened ; 

 fourth joint short and slender ; rostrum reaching not quite to the inter- 

 mediate coxPB. PrOnotum a little wider than long, the sides curving 

 inward a little at the anterior angles, the angles short, the submargin 

 remotely ciliated, the edge distinctly recurved ; surface moderately 

 convex, highly polished, uneven and depressed behind the middle ; the 

 anterior lobe more convex, rough and closely punctate each side, more 

 finely punctate near the angles; the transverse line interrupted in the 

 middle, remotely, coarsely punctate, and with a group of punctures be- 

 hind the disk; anterior margin moderately sinuated, the coUum-like mar- 

 gin obsolete on the middle, but defined there by a curved series of coarse 

 punctures ; the surface depressed in front of the humeri, the humeri 

 slightly prominent, and the sinus adjoining them very s.Uortand shallow. 

 Lateral flaps of the prosternum slender, abbreviated, a little arcu- 

 ated. Legs piceous, a little tinged with rufous; the anterior tibire 

 moderately expanded, armed on the outer margin with about eight 

 long stout spines. Ostiolar canal with a slender carina from the base to 

 near the tip. Scutellum transversely, convexly elevated near the base, 

 and convex behind the middle, coarsely, remotely punctate on the disk: 

 the tip narrow and very finely, obsoletely punctate; the lateral margins 

 with a line of very coarse punctures, which begin in a groove behind 

 the base, and then continue without the groove from behind the middle 

 to near the tip ; the transvere line at base very deep, minutely punc- 

 tate. Corium minutely, obsoletely punctate, on the disk very remotely, 

 and on the sutures very coarsely so ; the posterior margin almost tiun- 

 cate, the outer angle blunt and scarcely prominent ; costal margin with 

 six or seven setigerous pits. Membrane quite short, slightly tinged 

 with brown. Venter highly polished, impunctate, excepting a trans- 

 verse line of coarse punctures next the suture of the basal segment ; 

 posterior edges of the segments each side with very minute teeth ; 



