382 Trans. Acad. Set. of St. Louis. 



antennae, the latter becoming slightly paler toward base, the elytra 

 clear aud bright testacL-ous throughout; head coarsely and moderately 

 sparsely punctured toward the sides 4 



4 — Form stouter and more parallel, the prothorax only slightly narrower 

 than the bead and less strongly narrowed behind from near the apex, 

 about a fifth longer than wide; elytra only slightly longer than wide, 

 subequal in width to the head, the punctures sparse and subserial at 

 the middle, closer and broadly, irregularly aggregated toward the 

 suture; abdomen sparsely punctulate as usual. Length 8.0 mm. ; width 

 1.2 mm. Arizona (Phoenix) phoenicis n. sp. 



Form more slender, the prothorax much narrower than the head, nearly 

 two -fifths longer than wide and strongly narrowed behind from near the 

 apex; elytra distinctly elongate, obviously narrower than the head, 

 sparsely punctate, with a somewhat well accentuated series of very 

 slightly larger punctures along the middle, the punctures fine, not no- 

 ticeably aggregated along the suture, except a single line along the 

 summit of the sutural bevel; last joint of the antennae slightly nar- 

 rower than the tenth, longer than wide and conoidally pointed. Length 

 8.0 mm.; width 1.1 mm. Arizona (Williams) and New Mexico (Las 

 Vegas) arizonicns n. sp. 



6 — Second antennal joint a little shorter than the third, the latter being 

 more strongly obconical in form, body large in size, strongly punc- 

 tured 6 



Second antennal joint rather longer and stouter than the the third, the latter 

 le.ss strongly obconical 7 



6 — Front distinctly though finely punctured between the frontal grooves; 

 elytral punctures moderately sparse and strong, the elytra clear rufous 

 throughout, the legs pale testaceous; head large and well developed, 

 very coarsely, rather closely punctate toward the sides, the puncture."? 

 elongate, strong, more rounded and close-set beneath, becoming less 

 distinct and sparser toward base; mandibles with a fine groove on the 

 flat under surface in addition to the deep external groove; prothorax 

 much narrower than the head, longer than wide, strongly narrowed 

 posteriorly from near the apex; elytra as long as the prothorax and 

 wider, longer than wide and narrower than the head; punctures of 

 the medial series stronger than the others as usual, the punctures 

 exterior to the series much finer than those toward the suture, the 

 summit of the deflexed flanks narrowly impunctate as usual. Length 

 7.7-9.2 mm.; width 1.25-1.4 mm. Washington State and Oregon (The 

 Dalles) pugetauns u . sp. 



Front almost impunctate between the grooves; elytral punctures coarser 

 and very sparse, the elytra pale testaceous, with the basal, apical and 

 lateral margins blackish; head well developed, the punctures rather less 

 coarse and not quite so close-set toward the sides as in pugetanus, the 

 under surface less strongly and more sparsely punctured; prothorax 

 longer than wide, slightly narrower than the head, moderately narrowed 

 behind; elytra elongate, slightly longer and obviously wider than the 

 prothorax and fully as wide as the head, the punctures coarse and 

 strongly impressed throu2;hout, obscurely serial at the middle. Length 



