Coleopterological Notices. 97 



Scutellum triangular, one-half wider than long ; sides feebly arcnate. Elytra 

 having series of minute, feeble and rather distant punctures, which are but 

 slightly more distinct and but slightly closer at the sides, not in the least reti- 

 culate ; discal stria fine and distinct, obsolete at basal fourth. Posterior tarsi 

 very slender, the third joint elongate, not dilated and not wider than the second. 

 Length 1.7 mm. 



Ai'izoua (Coolidge). 



The nietasternal process, as usual, projects beyond the coxa? and 

 IS strong-ly rounded at apex, with a fine apical bead ; it is about three 

 times as wide as the prosternal process, the latter moderate in width. 



This species very greatly resembles simplex, but differs in its 

 finer, feebler, sparser and less dilated punctures at the sides of the 

 elytra, in its still more slender posterior tarsi, and in its decidedly 

 smaller size. It is represented by two specimens, collected by Mr. 

 H. F. Wickham. 



P. simplex Lee. — Proc. Ac. Phil., 1856, p. 16. — Ovoidal, more pointed 

 behind, black ; legs and antennze piceo-testaceous ; upper surface highly 

 polished. Head feebly siibtruucate in the middle at apex, feebly convex, very 

 minutely feebly and sparsely punctate ; antenna rather short, the club about 

 as long as the six preceding joints together, not very robust, the eleventh joint 

 one-half wider than the ninth and nearly one-half longer than the two preced- 

 ing together. Prothorax slightly more than twice as wide as long, two-thirds 

 wider at base than at apex ; basal bead almost completely obsolete ; disk very 

 minutely, sparsely and feebly punctate. Scutellum large, two-thirds wider 

 th9,n long, triangular, the sides very feebly arcuate, and the apex just visibly 

 rounded, the surface extremely finely sparsely and obsoletely punctate. Elytra 

 about two and one-third times as long as the prothorax, gradually narrowed 

 behind and acutely rounded at apex, the sutural stria very fine and as usual 

 continuous along the scutellum, the discal stria fine but distinct, terminating 

 at one-fifth the length from the base ; disk polished, not at all reticulate or 

 subgranulose, except very obsoletely so near the apex, and in the very vaguely 

 impressed strise adjacent to the ill-defined rows of punctures, the latter very 

 fine and feeble except near the sides and apex, where they become abruptly 

 unusually large, strong and broadly lunate ; the vaguely defined impressed 

 lines are, however, more or less definable nearly to the base. Abdomen covered 

 sparsely with very coarse hairs, denser toward the middle. Leys moderate ; 

 posterior tarsi slender, nearly three-fourths as long as the tibia, the basal 

 joint not quite one-half as long as the second. Length 1.9-2.5 mm. 



New Mexico ; Texas ; Iowa. 



The nietasternal process is broad, distinctly prolonged beyond the 



middle coxae, broadly and distinctly rounded and subtruncate in the 



middle at apex, with the mesosternal bead rather fine. The vague 



impressed lines of the elytra, which are distinctly visible in some 



Annals N. Y. Acad. Sci., V, Feb. 1890.— 7 



