280 THE CANADIAN KNTOMOLOGIST. 



P. angustus, n. subsp. — Still narrower and rather more depressed than 

 quercus, the head more coarsely and closely cribrate ; prothorax one-half 

 wider than long, the sides parallel, arcuately rounding near the apex and 

 somewhat abruptly converging in about basal, third, the basal angles 

 obtuse and narrowly rounded ; surface punctured as in quercus, but with 

 the side margins twice as broadly reflexed, this being a very conspicuous 

 character ; elytra still more coarsely sculptured than in quercus and more 

 obscurely striate. Length, $, 8.7 mm.; width, 2.75 mm. A single 

 specimen from the Levette cabinet, probably collected in Colorado. 



P. Iowanus, n. subsp. — Nearly similar to quercus but smaller, more 

 abbreviated and of a deeper and more polished, more greenish-black 

 colour ; mandibles, when fully developed, shorter, more prominent 

 externally near the base and with a deeper external sinus, the head more 

 coarsely and densely cribrate ; prothorax nearly as in quercus but more 

 transverse, being three-fourths wider than long and more densely, some- 

 what more coarsely punctate ; elytra shorter, not more than one-half longer 

 than wide, coarsely, deeply and closely punctate, and with impressed striae 

 more or less lost externally ; the female differs from the male in the same 

 general direction as in quercus, but the colour is deep greenish black, and 

 not paler and more aeneous, though the legs and abdomen are pale rufous, 

 a character wholly wanting in the male ; the elytra are relatively more 

 elongate and the prothorax shorter than in the female of quercus. Length, 

 o » 9 . 8.5-9.0 mm.; width, 3.C-3.35 mm. Iowa (Keokuk). 



The following is apparently specifically different from quercus ; 



P. peregrinus, n. sp. — Larger and rather stouter than quercus, 

 moderately shining, black above and beneath, the elytra somewhat 

 senescent ; head strongly, unevenly and, on the whole, not very closely 

 punctate, the fully-developed mandibles longer, less bent and less 

 prominent basally than in quercus, the antennae nearly similar, though 

 with the last joint less oblique ; prothorax two-thirds wider than long, the 

 sides converging and perfectly straight from the obtuse angulation at basal 

 third to the apex, converging basally, the angles obtuse and blunt ; surface 

 punctured as in quercus, the side margins very narrowly reflexed ; elytra 

 nearly as in quercus, except that the punctures are coarser, more rounded 

 and less lineiform. Length, £ , 11.5 mm.; width, 3.8 mm. Oregon. 



Differs from quercus principally in its larger size, obtusely rounded 

 basal angles of the prothorax, coarser sculpture, form of the fully developed 

 mandibles and other characters. 



