AMERICAN COMPONENTS OF THE TENTVRIIN^ 355 



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

 nearly even and wholly unimpressed series, the interstitial punc- 

 tures but little smaller, arrancj^ed in irrej^ular single series but 

 broadlv confused toward the suture ; abdomen sparsely but rather 

 stronglv punctate medially. Length 4.S-5.3 mm. ; width i.S^-2.2 

 mm. California (San Francisco) ater Lcc. 



Form oblong-oval, slightly shorter than in afer, 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 antl feel)ly arcuate, 

 moi'e 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, fecl)ly 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 scries ; abdomen 

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

 width 2.iSmm. California (near San Francisco), — G. W. Dunn. 



moEStus n. sp. 



Form nearly as in aier 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, 

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

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

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

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

 rather close-set, becoming somew^hat 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, obtuselv in the female, the punctures rather coarse, not 

 muricate, deeply 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- 

 2.3^ mm. Arizona (Seligman and Canyon Cosnino). 



nitidus Csy. 



7 — Color black, the elytral series not impressed 8 



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

 feebly impressed 9 



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



sometimes duller; legs very dark rufous; head rather coarsely. 



