388 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



in its deeper part. Prosternum wide, the margius narrow, abbreviated 

 in front. Legs rufo-piceous ; the anterior tibite rather wide, armed on 

 the outer edge with about nine not very long piceous spines ; tarsi 

 ferruginous. Corium tinged with rufous, particularly on the costal 

 area 5 the sutures coarsely punctate, the costal area and the base and 

 apex of the discoidal area finely punctured and minutely uneven, the 

 disk with only vestiges of punctures, which are placed very wide apart ; 

 membrane of medium length, a little brownish. Venter very smooth, 

 remotely ciliated exteriorly, with the posterior edges of the segments 

 exteriorly very minutely denticulated. 



Length 7-9 millimeters. Width of base of pronotum 3i-5 millimeters. 



From Mexico. One specimen from Arizona. 



The head is longer and less bluntly rounded than in P. hilineatus Say, 

 to which it is the most closely related. All the specimens seen by me, 

 one of them a type sent to me by Dr. Signoret, agreed in ha\ ing three 

 setigerous pits on the costal margin of the corium. I have alluded to 

 setigerous pits on the head of this species, while I have not done so in 

 the descriptions of either of the other species. This is owing to the 

 fact that, although I had fresh specimens before me in some cases, none 

 of them exhibited the bristles here described. 



5. P. piceatus. 



Pangceus piceatus Stal, Hemipt. Mexicana, 1862, xxiii, 95, No. 48. 



Oval, almost ovate, pale castaneous, or piceous, polished. Head longer 

 than wide, depressed anteriorly, the margin broadly recurved, hardly 

 bluntly arcuated, remotely ciliated ; the lateral lobes longitudinally 

 channeled in two places, and with a few oblique stride, the pits obsolete ; 

 tylus reaching the tip of the head, narrowed at the apex, the cheeks not 

 quite meeting in front of it, its middle convexly elevated. Antennai 

 stout, the basal joint thick, not reaching to the margin of the head ; the 

 second very slender: subequal to the first ; third much longer, increasing 

 in thickness toward the tip; fourth and fifth about equal, scarcely longer 

 than the third. Rostrum ferruginous, reaching to the intermediate 

 coxse; the second joint compressed, a little arched, somewhat longer 

 than the first. Pronotum a little wider than long, the lobes well 

 separated by the deep transverse line, each a little convex, the line 

 punctate, and with only a few punctures behind its middle, remaining 

 surface impunctate ; lateral margins obliquely narrowing toward the 

 front, very remotely ciliated ; the humeri distinct, convexly ridged, the 

 sinus next to them almost obsolete. Scutellum a little longer than wide, 

 narrow at tip, feebly convex ; the depressed line at base minutely punc- 

 tate, the surface almost as far as the tip and the impressed lateral line 

 coarsely, remotely punctate. Legs pale rufo-piceous ; the anterior tibije 

 moderately expanded, armed on the outer margin with about eight long, 

 slender spines. Corium a little uneven, impunctate, excepting on the 

 base and basal portions of the sutures; costal edge with only one or 

 two setigerous pits ; membrane faintly brownish. Ostiolar canal broad, 

 obliquely striated next to the tij). Venter paler, smooth, impunctate. 



