AMERICAN COMPONENTS OF THE TENTYRIINyE 359 



wider than long, the sides subevenly and rather strongly arcuate, 

 more converging anteriorly, widest just behind the middle, the 

 basal angles obtuse, the apical only moderately deflexed, right, 

 only slightly blunt, the punctures rather small but deep, moder- 

 ately separated, becoming rapidly larger, close and longitudinally 

 subconfluent in about lateral fifth; scutellum as in implica}is ; 

 elytra much more oval and more gradually and acutely ogival at 

 tip, nearly one-half longer than wide, not quite three times as 

 long as the prothorax, and, at the middle, obviously wider, the 

 sides parallel and broadly, evenly arcuate, the punctures rather 

 sparse, moderate in size and slightly larger laterally, confused 

 throughout, the larger arranged in imperfect series becoming more 

 distinct laterally ; abdomen strongly, rather closely and conspicu- 

 ously punctate throughout but especially toward the sides as usual. 

 Length 6.2 mm.; width 3.75 mm. New Mexico (Santa Fe). 



fallax Csy. 



Form slightly less stout, otherwise nearly similar, shining, blackish- 

 piceous, the elytra rufescent, the legs piceo-rufous ; head nearly 

 similar, about as wide as an elytron, the obliqvie sutures more dis- 

 tinct but not attaining the margin ; prothorax nearly similar but 

 rather shorter, the sculpture similar, except that the punctures do 

 not become sparser toward the sides anteriorly as is the case in 

 fallax; scutellum rather smaller, sometimes minute, the elytra 

 nearly similar in general form but with the serial punctures ex- 

 tremely minute and still very small even toward the sides, the 

 series imperfect, the interstitial punctures very minute, sparse and 

 confused, equal to the serial punctures suturally but notably 

 smaller laterally ; abdomen finely, sparsely punctate medially, 

 much less conspicuously so than in fallax. Length 5.6-^8 mm. ; 

 width 3.33-3.5 mm. Colorado (Cab. Levette)...finitinius n. sp. 



14 — Elytral series very obvious, distinct throughout the width of the 

 elytra 15 



Elytral series traceable with difficulty, especially toward the suture... 17 



15 — Elytra opaque. Body rather stout, oblong, parallel, rather 

 strongly convex, deep black, the legs clear but dark rufous ; head 

 strongly, closely punctate, broadly and almost rectilinearly truncate 

 at apex, the sides converging, broadly arcuate, the angles obvious 

 though broadly rounded ; antennae even somewhat stouter than 

 usual ; prothorax subopaque, nearly three-fourths wider than long, 

 moderately narrowed and rather feebly sinuate at apex, the sides 

 broadly and somewhat feebly arcuate, more converging apically 

 than toward base, the apical angles deflexed, right and blunt ; 

 punctures strong and close-set, becoming dense and somewhat 

 larger laterally ; scutellum small, tumid ; elytra one-half longer 

 than wide, scarcely three times as long as the prothorax and not 

 evidently wider, the sides very feebly arcuate, the apex gradually 

 and obtusely ogival, the punctures rather strong laterally, some- 

 what close-set in subeven unimpressed series, disappearing only 



