AMERICAN COMPONENTS OF THE TENTYRIIN^ 355 



arcuate, the punctures moderate in size, very widely spaced in 

 nearly even and wholly unimpressed series, the interstitial punc- 

 tures but little smaller, arranged in irregular single series but 

 broadly confused toward the suture ; abdomen sparsely but rather 

 strongly punctate medially. Length 4.S-5.3 mm. ; width 1.85-2.2 

 mm. California (San Francisco) ater Lee. 



Form oblong-oval, slightly shorter than in ater^ deep black, the legs dark 

 rufo-piceous ; head small, obviously narrower than an elytron, 

 dull, very finely, rather sparsely punctate, the punctures coarser 

 and close-set anteriorly, the sides strongly converging and strongly 

 arcuate, the apex broadly arcuato-truncate ; prothorax short, not 

 quite twice as wide as long, the sides evenly and feebly arcuate, 

 more converging anteriorly, the apex strongly sinuate, evidently 

 narrower than the base, the punctures fine but deep, rather sparse, 

 becoming closer and moderately coarse but still evidently separated 

 in about lateral fifth ; scutellum moderate, tumid ; elytra two-fifths 

 longer than wide, three times as long as the prothorax but scarcely 

 perceptibly wider, the sides broadly, feebly arcuate, the apex gradu- 

 ally rather acutely ogival, the punctures somewhat coarse, close- 

 set in subeven series, which are evidently though feebly impressed 

 toward the suture, the interstitial punctures very fine, sparse, con- 

 fused though sometimes forming uneven single series ; abdomen 

 smooth, minutely, sparsely punctate medially, Length 4.8 mm. ; 

 width 2. 1 8 mm. California (near San Francisco), — G. W. Dunn. 



moestus n. sp. 



Form nearly as in ater but less convex, still more highly polished, 

 black, the legs piceo-rufous ; head rather finely but deeply, very 

 closely punctured, not quite as wide as an elytron, broadly, 

 evenlv arcuate at apex ; prothorax about three-fourths wider than 

 long, the apex narrower than the base and deeply sinuate, 

 the sides parallel, evenly and very strongly arcuate, the basal 

 angles very obtuse, the punctures not very coarse but perforate and 

 rather close-set, becoming somewdiat abruptly not much larger 

 but still closer and partially confluent in lateral fourth ; scutellum 

 rather variable, moderate to minute in size ; elytra three times as 

 long as the prothorax to somewhat less, suboval, acutely ogival at tip 

 in the male, obtusely in the female, the punctures rather coarse, not 

 muricate, deejolv impressed, not very close-set in somewhat uneven 

 series, the interstitial punctures smaller but distinct in rather irregu- 

 lar single series even near the suture ; abdomen sparsely but 

 rather strongly punctate medially. Length 5.5 mm.; width 2.2- 

 2.35 mm. Arizona (Seligman and Canyon Cosnino). 



nitidus Csy. 



7 — Color black, the elvtral series not impressed 8 



Color piceous-black to dark brown, the elytral series very narrowl}- and 



feebly impressed 9 



8 — Body oblong-elongate, convex, slightly shining to alutaceous and 



sometimes duller; legs verv dark rufous; head rather coarsely, 



