AMERICAN COMPONENTS OF THE TENTYRIIN^ 345 



third than at base, the sides subevenly and rather strongly arcuate, 

 the basal angles obtuse and slightly blunt ; apex moderately sin- 

 uate and not less than three-fourths as wide as the base, the punc- 

 tures strong though fine, well separated, becoming dense and 

 longitudinally confluent, though not much larger, toward the 

 sides ; scutellum smooth, broadly rounded, about a sixth as wide 

 as the base of an elytron ; elytra nearly one-half longer than wide, 

 about two and one-half times as long as the prothorax but not 

 wider, gradually acutely ogival at tip, the sides parallel and 

 broadly arcuate, the punctures small but deep, rather approximate 

 in very obsoletely impressed series, the intervals very minutely, 

 sparsely and confusedly, but toward the sides more distinctly, 

 punctate, the punctures forming a nearly even series on the alter- 

 nate intervals of the flanks ; abdomen minutely, sparsely punctu- 

 late medially. Length 5.3-6.2 mm.; width 2.4-2.65 mm. Ari- 

 zona (Peach Springs), — H. F. Wickham lubricans n. sp. 



Form elongate-oval but slightly stouter, castaneous or testaceous, the 

 under surface and legs rufous, the abdomen blackish except at the 

 sides and tip ; head with rather small but deep, somewhat close- 

 set punctures, the sides less converging and more strongly arcuate 

 than in lubricans^ the apex more evidently sinviate ; prothorax 

 three-fourths to two-thirds wider than long, otherwise nearly sim- 

 ilar, except that the sides are less strongly arcuate and the width 

 at basal fourth less evidently greater than at base, the punctures 

 much more close-set medially but less confluent toward the sides ; 

 scutellum about an eighth as wide as the base of an elytron ; 

 elytra nearly similar in form but more obtusely ogival at tip, sim- 

 ilarly punctured but with the slightly irregular series wholly un- 

 impressed ; abdomen finely but more strongly and less sparsely 

 punctate medially. Length 5.9-6.7 mm. ; width 3.7-2.9 mm. 

 Arizona (Winslow) and Utah (Leeds), — H. F. Wickham. 



hilaris n. sp. 



Form elongate-oval, convex, pale yellowish-testaceous throughout — 

 possibly somewhat immature; head rather finely but loosely and 

 substrigosely punctured, very densely on the epistoma, the sides 

 moderately converging, evenly and rather strongly arcuate, the 

 apical margin evidently sinuate ; prothorax strongly narrowed an- 

 teriorly, fully three-fourths wider than long, the deeply sinuate 

 apex but little more than two-thirds as wide as the base, the sides 

 broadly, feebly arcuate basally, becoming subparallel behind the 

 middle, strongly converging anteriorly, becoming broadly and 

 feebly sinuate toward the apical angles, which are however blunt 

 and not prominent, the basal angles very obtuse and somewhat 

 rounded ; punctures moderately fine, impressed, strong, rather 

 widely separated, becoming coarse, dense, rugulose and coales- 

 cent laterally; scutellum not more than a seventh as wide as an 

 elytral base ; elytra two and one-half times as long as the pro- 

 thorax but not wider, acutely ogival at tip, with just visibly im- 



Proc. Wash. Acad. Sci., September, 1907. 



