AMERICAN COMPONENTS OF THE TENTYRIIN^ 305 



laterally; scutellum small, transverse; elytra but little more than 

 one-half longer than wide, obtusely and ogivally rounded at tip, 

 barely three times as long as the prothorax, the punctures rather 

 strong, sparse, smaller and confused near the suture, coarse and 

 rather close-set in series laterally, with the interstitial punctures 

 still larger and more distant in the series, all the punctures much 

 coarser and closer near the humeri ; abdomen not very finely or 

 sparsely and conspicuously punctured medially. Length 7.3 

 mm.; width 2.85 mm. Texas (El Paso) cribriceps n. sp. 



Form very stout, convex, shining, rufo-castaneous, the elytra some- 

 times picescent, the under surface and legs paler, rufous; head 

 relatively rather small, scarcely more than half as wide as the pro- 

 thorax, coarsely, deeply, closely and perforately punctate, the 

 sides rather strongly converging and broadly, evenly arcuate ; 

 prothorax not quite twice as wide as long, distinctly narrowed 

 toward apex, the sides strongly, subevenly arcuate, the punctures 

 strong, sparse, gradually . becoming larger and closer laterally, 

 very coarse aiid dense though imperfectly confluent near the sides ;' 

 scutellum transverse, minutely punctate; elytra short, barely one- 

 half longer than wide, the serial punctures rather close-set, the 

 interstitial larger and more widely spaced; abdomen strongly but 

 finely, moderately sparsely punctate toward the middle. Length 

 6.0-6.3 'ii'""!' ; vvidth 2.7-2.8 mm. Texas (Laredo). 



cognitum n. sp. 



29 — Form moderately stout, convex, dark castaneous, the under sur- 



face and legs rufo-piceous, moderately shining; head with mod- 

 erately small, deep and well separated punctures, the sides before 

 the eyes converging and broadly, evenly arcuate for an unusually 

 long distance to the truncate apex ; prothorax large, only very 

 slightly narrower than the elytra, fully three-fourths wider than 

 long, evidently narrowed at apex, the sides moderately and sub- 

 evenly arcuate, the punctures toward the middle not large but 

 very deep and rather sparse, gradually becoming very coarse and 

 close, elongate but not confluent toward the sides ; scutellum 

 small, but little wider than long; elytra one-half longer than 

 wide, with broadly arcuate sides and obtusely ogival apex, strongly 

 punctured in not very close-set series, the punctures of the inter- 

 stitial series widely separated ; abdomen minutely, sparsely punc- 

 tate medially. Length 6.0-6.5 'ill"'"'' 5 vv'idth 2.6-2.78 mm. Cali- 

 fornia (Barstow) concors n. sp. 



30 — Fronotum sparsely punctured, becoming more or less abruptly 



very much more coarsely so in about lateral fifth 31 



Fronotum more coarsely, deeply and more or less closely punctured, 

 very gradually and less notably more coarsely so broadly toward 



the sides 35 



31 — Fronotal punctures in the broad median area strong and deep, 

 much larger than in the four following species. Body small in 

 size, stout, oblong-oval, convex, rather shining, black, the legs 



