AMERICAN COMPONENTS OF THE TENTYRIIN^ 333 



rounded angles; prothorax four-fifths wider than lono, sub- 

 parallel, with feebly rounded sides, becoming more rounded and 

 converging apically, the angles obtuse, the apex moderately 

 snuiate, the surface feebly and indefinitely impressed at the middle 

 before the base ; scutellum moderate, constricted at base ; elytra 

 fully three-fourths longer than wide, three and one-half times as 

 long as the prothorax and scarcely at all wider, parallel and nearly 

 straight at the sides, gradually ogival in apical two-fifths, with 

 regular unimpressed series of rather coarse, deep, non-muricate 

 punctures, the interstitial punctures very fine, feeble and forming 

 uneven single series ; abdomen feebly rugulose, finely and sparsely 

 punctured. Length 6.2 mm.; width 2.2S-2.35 mm. Arizona. 



tenuis n. sp. 

 Punctures of the pronotum more or less fine and notably sparse, be- 

 coming very abruptly coarser, dense and forming long parallel 

 rugas toward the sides . 



4 — Form parallel, stouter than in tenuis, shining, piceous-black, the 

 under surface and legs dark piceo-rufous ; head nearly as in tenuis 

 but rather more coarsely, densely sculptured ; prothorax very mod- 

 erately transverse, about three-fourths wider than long and not 

 much less than a third as long as the elytra, narrowed gradually 

 toward the sinuate apex, with the sides subevenly and rather 

 strongly arcuate, the surface with a somewhat deep indentation 

 before the middle of the base ; scutellum small ; elytra one-half 

 to two-thirds longer than wide, very slightly wider than the pro- 

 thorax, obtusely ogival in apical third, sculptured nearly as in 

 tenuis, the serial punctures very close-set, those of the intervals 

 in subeven series and somewhat minute and feeble ; abdomen sim- 

 ilar. Length 5.2-6.3 mm.; width 2.0-2.45 ""i"^- California 

 (San Diego) longulus Lee. 



Form narrow but more elongate-oval than in longulus and paler in 

 color, pale piceo-castaneous, the suture suffusedly paler, rufous, 

 the under surface and legs red ; surface shining ; head nearly as 

 in lofzgulus, the prothorax shorter and more transverse, about 

 four-fifths wider than long, rather more strongly narrowed at 

 apex, with the sides subevenly but less strongly arcuate, otherwise 

 similar ; elytra one-half to three-fifths longer than wide, three and 

 one-half times as long as the prothorax and but slightly wider, 

 evenly and more acutely ogival at apex and with the sides 

 rather more evidently arcuate, the sculpture nearly similar ; tarsi 

 very slender ; metasternum equal in length to the first ventral. 

 Length 5.2-6.2 mm.; width 2.1-2.42 mm. California (Los 

 Angeles and San Diego Cos.) filitarsis n. sp. 



5 — Body decidedly shorter and relatively stouter than in any of the 

 preceding species, shining, convex, rather dark and uniform rufo- 

 testaceous throughout ; head not very coarsely or closely punctato- 

 strigose, the sides moderately converging and not very strongly 

 arcuate, the angles more distinct and less broadly rounded than in 



