AMERICAN COMPONENTS OF THE TENTYRIIN^E 315 



fifths as wide as the base, the angles obtuse but not rounded, the 

 punctures very fine and sparse, becoming gradually rather coarse, 

 muricate, close but still separated toward the sides; scutcllum 

 moderate, transverse; elytra nearly one-half longer than wide, 

 three times as long as the prothorax and nearly a fifth wider, the 

 sides feebly arcuate, the humeri but slightly exposed at base, the 

 apex obtusely rounded, the punctures fine, becoming rather coarse 

 laterally, close-set in wholly unimpressed series, the intervals 

 minutely, sparsely and more or less confusedly punctate; surface 

 on the posterior declivity having two or three feebly elevated 

 lines, which bear small and widely separated asperities; abdomen 

 verv finely, sparsely punctate medially. Length 6.5 min. ; width 

 2.85 mm. Texas (El Paso), — H. F. Wickham rubida n. sp. 



7 — Form oblong-elongate, moderately convex, blackish-castaneous, 



the under surface and legs in great part rufous ; surface feebly 

 alutaceous; head closely, shallowly and muricately punctate, 

 minutely and sparsely so on the occiput, the sides before the eyes 

 strongly convergent, evenly and moderately arcuate, the epistoma 

 tumid and densely sculptured ; prothorax nearly four-fifths wilder 

 than long, widest near the middle, the sides rather strongly, sub- 

 evenly rounded, more converging anteriorly, becoming broadly 

 and just visibly sinuate behind the apical angles, which are acute, 

 the apex deeply sinuate, the lateral edges very narrowly reflexed 

 and minutely, obsoletely serrulate, the punctures minute and 

 sparse, becoming larger and muricate but still well separated 

 toward the sides; elytra as in protninens^ three-fifths longer than 

 wide and a fourth wider than the prothorax, closely and rather 

 strongly punctured in nearly even, unimpressed series, the inter- 

 vals unevenly uniseriate, the punctures rather close-set but in great 

 part confused toward base ; abdomen polished as usual, minutely, 

 sparsely punctulate. Length 6.7 mm. ; width 2.7 mm. Arizona 

 (near Benson) vafra n. sp. 



Form similar to the preceding, rather more shining, castaneous, the 

 under surface and legs bright rufous; head nearly as in vafra 

 but decidedly smaller and more obviously impressed at the middle 

 of the vertex; prothorax rather more transverse though similar in 

 form and rotundity of the sides, the latter more converging and 

 straight anteriorly, with the angles right and not all prominent, 

 the punctures fine and sparse, becoming decidedly larger, only 

 slightly muricate and well separated toward the sides; elytra as 

 in vafra but much more finely and feebly punctate in subeven 

 series, with the interstitial punctures minute, feeble, sparse and 

 irregular, not over a fifth wider than the prothorax ; abdomen 

 similarly very minutely, feebly and sparsely punctulate and 

 strongly convex. Length 6.5 mm. ; width 2.65 mm. Texas 

 (near El Paso) proxima n. sp. 



8 — Form oblong-suboval, moderately convex, strongly alutaceous 



and but feebly shining, pale ferruginous throughout ; head rather 



