AMERICAN COMPONEINTS OF THE TENTYRITN^ 337 



Body oblong, parallel, more elongate, rather convex, subalutaceous, pice- 

 ous-black, the under surface dark, the legs paler, rufous ; head not 

 very coarsely but deeply and closely punctured, the frontal margin 

 not at all biemarginate, the oblique sutures subobsolete, the sides 

 very strongly converging, evenly and rather feebly arcuate, the 

 sinuato-truncate apex unusually contracted, only about half as wide 

 as the width at the eyes ; prothorax less transverse, four-fifths 

 wider than long, the deeply sinuate apex only slightly narrower 

 than the base, the sides evenly and rather strongly arcuate, the 

 punctures not very small, deep and rather close-set, becoming 

 gradually close, coarser and unevenly, longitudinally confluent lat- 

 erally ; scutellum well developed, shining, impunctate, rounded 

 behind ; elytra in form nearly as in piceus^ but with the punctures 

 coarse, deep and close-set in subeven and evidently impressed 

 series, the interstitial punctures fine but distinct, arranged in 

 rather inieven single series ; abdomen finely but deeply, less 

 sparsely punctate medially, the first segment in great part coarsely 

 so laterally. Length 7.0 mm. ; width 2.S mm. California (near 

 San Diego) oblongulus n. sp. 



3 — Prothorax widest before the base; scutellum well developed, about 



a sixth as wide as the base of a single elytron 4 



Prothorax widest at the base ; scutellum variable 5 



4 — Oblong-oval, moderately convex, alutaceous, rather dark red- 



brown, the legs but little paler and more rufous ; head very 

 finely, sparsely punctate, less finely, densely so anteriorly, the 

 sides strongly converging, evenly and strongly arcuate, the epi- 

 stoma broadly sinuato-truncate, the sutures impressed posteriorly 

 but obsolete toward the edge ; prothorax short, nearly twice as 

 wide as long, strongly narrowed and sinuate at apex, with the 

 angles acute but not prominent, widest at two-fifths from the base, 

 where the sides are strongly arcuate, becoming feebly converging 

 basally and strongly and much less arcuate toward apex ; punc- 

 tures minute and rather sparse, becoming gradually larger and 

 closer but not very coarse or coalescent laterally ; elytra three- 

 fourths longer than wide, between three and four times as long as 

 the prothorax but not wider, obtusely ogival toward tip, the sides 

 very slightly arcuate, the punctures very fine, close-set in feebly 

 and finely impressed, slightly uneven series, the intervals extremely 

 minutely, sparsely and unevenly punctulate. Length 7.0 mm. ; 

 width 2.S mm. Utah (Great Salt Lake) laborans n. sp. 



Oblong-oval, rather more convex, the elytra strongly shining, the ante- 

 rior parts slightly alutaceous, pale brownish-testaceous through- 

 out ; head finely but more strongly and less sparsely punctate than 

 in laborans but otherwise nearly similar; prothorax less trans- 

 verse, three-fourths or more wider than long, narrowed at the sin- 

 uate apex, scarcely visibly wider at basal third than at base, the 

 sides broadly and more evenly arcuate, the punctures rather less 

 fine but nearly as sparse, becoming similarly larger, closer and 



