AMERICAN COMPONENTS OF THE TENTYRIIN^ 35 1 



Body shorter, relatively stouter and more strongly narrowed before 

 and behind than in proprhis^ strongly convex, polished, black or 

 piceous-black, the legs blackish, paler distally ; head finely, 

 rather closely, substrigosely punctate, the epistoma densely and 

 normally, the apex broadly arcuate, the sides strongly so, the 

 angles obsolete ; prothorax two-thirds wider than long, widest 

 near basal fourth, where the sides are strongly rounded to the 

 base, thence unusually converging to the greatly narrowed apex, 

 becoming nearly straight, the apex deeply sinuate and only two- 

 thirds as wide as the base, with the angles somewhat acute and 

 prominent ; punctures deep, not very fine and rather close-set, 

 becoming rapidly coarse, dense, coalescent and forming long 

 longitudinal rugae in about lateral fifth ; scutellum small, smooth ; 

 elytra strongly oval, rather more than one-half longer than wide, 

 fully three times as long as the prothorax, and, at the middle, 

 nearly a fourth wider, gradually becoming acutely ogival almost 

 in apical half, the sides evenly and strongly arcuate to the base of 

 the prothorax, the punctures coarse laterally, close-set in rather 

 uneven unimpressed series, those of the intervals almost as large, 

 confused suturally, in uneven single series laterally ; abdomen 

 finely, sparsely punctured medially. Length 5.S mm. ; width 

 2. S3 mm. Texas (El Paso), — H. F. Wickham. 



perovatus n. sp. 



Body much narrower than in any of the preceding species, elongate- 

 oval, convex, rather dull in lustre, blackish, the under svu'face 

 rufescent, the legs bright rufous ; head strongly but not very 

 coarsely, closely and strigosely punctate, the converging sides 

 strongly arcuate, the apex broadly and more feebly ; prothorax 

 short, more than three-fourths wider than long, widest just be- 

 hind the middle, where the sides are moderately arcuate, thence 

 becoming subparallel and very feebly so to the base and moder- 

 ately converging and straight to the apex, the latter rather deeply 

 sinuate and fully three-fourths as wide as the base, with the angles 

 somewhat acute but not very prominent, the punctures rather 

 coarse and very close-set, becoming abruptly dense but not much 

 larger and forming long longitudinal rugiB in lateral sixth or 

 seventh ; there is a short and somewhat tumid medial impunc- 

 tate line near the base ; scutellum small ; elytra fully three-fifths 

 longer than wide, more than three times as long as the prothorax 

 and nearly a fifth wider, gradually rather acutely ogival in about 

 apical third, the sides evenly and moderately arcuate, the punc- 

 tures rather large but shallow, moderately close-set in slightl)^ 

 irregular series, those of the intervals nearly as large, the sculpture 

 rugulose, rendering the punctures indistinct; abdomen minutely, 

 sparsely punctate medially. Length 5.1 mm.; width 3.23 mm. 

 Arizona (Nogales), — H. F. Wickham aridus n. sp. 



The species more immediately allied to convexus Lee, form 

 a difficult study and will require care in discrimination. The 



