»4. 



Clypeus with two setigerous punctures on each side, presternum at middle punctured 

 and pubescent. 

 Surface opaque, form elongate, thorax nearly as wide at apex as at base. 



12- carbonarius, Say. 

 B. Terminal spur of anterior tibiae dilated at middle. (Aniudactylus.) 



a. Posterior tarsi slender, equal to the tibire, first joint long; first joint of middle tarsus 



rf pubescent at tip. Black species, glabrous; elytra striate, often very finely; 

 second stria with a dorsal puncture. 

 Clypeus on each side with one setigerous puncture. 

 Surface opaque, elytra feebly striate, especially at tip. 



Hind angles of thorax obtuse, sides regularly areuate, base as wide as the 



elytra 13. fttrvus, Lee. 



Hind angles of thorax sharply rectangular, sides of thorax slightly arcuate pos- 

 teriorly, base narrower than the elytra (Pacific coast species.) 

 Intercoxal process and middle of second abdominal segment punctured, 

 punctures with short setae. Metasternum front and behind punctured . 

 Thorax feebly narrowed posteriorly, basal impressions very feeble, surface 



entirely punctured 14, semipttnctatUS, Lee. 



Intercoxal process and metasternum smooth. 



Thorax with broad but very shallow basal impressions. Elytra broad, 



sides distinctly arcuate 15 COnsobrinilS, Lee. 



Thorax with rather deep linear impressions. Elytra nearly parallel. 



16 californicus, Dej. 



Surface shining in both sexes, elytra more deeply striate. 



Elytral intervals feebly convex, quite distinctly but sparsely punctulate, elytra 



oblong, sides nearly parallel, surface feebly shining. 17 JnterpunctatUS, Kby. 



Elytral intervals convex, smooth, elytra oval, sides arcuate, surface shining; 



form more robust 18 agricola, Say. 



Clypeus on each side with two setigerous punctures. 

 Hind angles of thorax obtuse. 



Side margin of thorax very distinctly depressed and with the base punctulate. 



13 Harrisii, Lee. 



Side margin of thorax scarcely depressed 20 nigeri'imus, Dej. 



Hind angles of thorax distinct, nearly rectangular. 



Elytral intervals distinctly but sparsely punctulate, sides of elytra nearly straight, 



subparallel 21 nigrita, Dej. 



Elytral intervals smooth, shining, sides of elytra distinctly arcuate, form more 



robust 22 melanopus, Hald. 



b. Postertor tarsi flattened, first joint short; first joint of middle tarsus^ glabrous be- 



neath; bi-colored or metallic species; elytra striate, dorsal punctures distinct, 

 Clypeus with one setigerous puncture on each side. 



Color variable, elytra 9 subopaque and often ferruginous with discal piceous 

 space. Intervals impunctate 23- nivalis, n. sp. 



