AMERICAN COMPONENTS OF THE TENTYRIIN^ 363 



Form less stout, strongly convex, slightly alutaceous, deep black, the 

 legs rufo-piceous ; head as wide as an elytron and more transverse 

 but otherwise similar, the pvmctures less aciculate, strong, pei^- 

 forate and close-set ; prothorax relatively smaller, but little more 

 than one-half wider than long, otherwise similar and rather feebly 

 sinuate at tip but with the punctures a little larger and less close- 

 set, although similarly crowded laterally and with the base not 

 quite as wide as the base of the elytra, the humeral angles being 

 slightly exposed at base ; scutellum moderate, transverse ; elytra 

 narrower and more elongate in the female, the only sex at hand, 

 with the sides much less arcuate, nearly one-half longer than 

 wide, scarcely three times as long as the prothorax and very little 

 wider, the punctures somewhat sparser but rather stronger and, 

 although generally confused, more distinctly seriate at various 

 parts of the surface than in aciitns ; abdomen minutelv, sparsely 

 punctate medially. Length 5.0 mm.; width 2.15 mm. Colo- 

 rado (Cab. Levette.) exiguus n. sp. 



20 — Form oblong-oval, strongly convex, polished, the elytra feebly 



alutaceous, black, the anterior parts and under surface occasion- 

 ally and sometimes the elytra, also, though less strongly, rufescent, 

 the legs dark rufous or paler ; head modei'ately coarsely and very 

 closely punctate, the frontal margin broadly, rectilinearly truncate, 

 the sides converging but strongly arcuate, becoming parallel 

 toward the eyes, the angles obliterated ; prothorax two-thirds to 

 three-fourths wider than long, the sides moderately converging, 

 subevenly and moderately to feebly arcuate from base to apex, the 

 latter only very feebly sinuate, the punctures deep and rather 

 coarse, more or less evidently separated, becoming abruptly 

 dense, though not much larger, and longitudinally anastomosing in 

 lateral sixth or seventh ; scutellum moderate, transverse, pro- 

 jecting behind the basal margin ; elytra short, two-fifths longer than 

 vv^ide, scarcelv two and one-half times as long as the prothorax and 

 somewhat wider, the sides rounding toward base, the apex rather 

 acutely ogival, the punctures of the broadly impressed and almost 

 regular series moderately coarse, close-set, those of the intervals 

 very minute, confused ; abdomen smooth, polished, finely but 

 strongly, sparsely punctured medially. Length 4.4-5.3 mm. ; 

 width i.S-2.25 mm. California (San Diego). \_ = na7iuhis 

 Csy.] obesus Lee. 



21 — Body oblong, stout, moderately convex, rather shining, deep 



black, the legs black with slightly piceous tinge ; head somewhat 

 coarsely, deeply, densely punctate, the punctures longitudinally 

 confluent laterally, smaller but not crowded on the epistoma, the 

 anterior margin strongly and almost uniformly arcuate from one 

 eye to the other; antenna; black, slightly paler distally ; prothorax 

 transverse, fully four-fifths wider than long, the sides subevenly 

 and strongly arcuate, sometimes more arcuate near the base, the 

 apex deeply sinuate, about three-fourths as wide as the base, with 

 the angles slightly obtuse and very blunt, the basal angles very 



