50 AMERICAN COLEOPTERA. 



Hind angles of tborax rectangular, the posterior lateral seta equidistant 

 from side and basal margins; legs black ; form less convex. Length 



.35-. 42 inch 43. coiiHsita Lee. 



8. Basal impressions of thorax feeble or nearly ob.-solete. 



Middle femora with four setigerou.s i)unctures along the inner niaigin. 

 Strije of elytra impunctate; base of thorax impunctate. 



Form oblong-oval ; })osterior lateral seta of thorax nearer the basal thwn 

 the side margin ; dull black or at most feebly seneous. Length .30- 



.36 inch 45. proteiisa Putz. 



Form ratlier broadly oval; posterior lateral seta of thorax equidisant 

 from side and basal margins; shining, usually more or less aeneous. 



Length .32-.35 inch 46. cont'iiiia Lee. 



Stria- of elytra punctured, sometimes very feel)ly ; base of thorax sub- 

 punctate. Length .27-. 32 inch 47. subpunclala Lee. 



Middle femora with two setigerous punctures along the inner margin, striae 

 of elytra finely punctulate. Length .29-. 31 inch. 



48. ceelebs n. sp. 



Basal impressions of thorax well marked, the outer oblique; middle femora 



with four setigerous punctures along the inner margin. Length .25- 



.28 inch 49. polila Lee. 



34. A. in^ignis Dej. — Form nearly ovate, convex. Color above nigro- 

 ieneous or nigro-cyaneous, shining, the females slightly alutaceous. Head 

 slightly narrower than the thorax at apex ; antennae shorter than the head and 

 thorax, not carinate, rufous; palpi rufous. Prothorax subquadrate. about one- 

 half wider than long, narrower at apex, widest immediately in front of the hind 

 angles: apex feebly emarginate; surface impunctate, except at sides of base, 

 where it is distinctly but not densely punctured ; median line distinct, extend- 

 ing between the transverse impressions, which are rather feebly marked ; basal 

 impressions shallow, bifoveate ; sides rounded in front, nearly parallel behind, 

 the margin slightly wider posteriorly ; base truncate ; hind angles obtuse, 

 rounded, not carinate. Elytra slightly wider than the thorax, subparallel, 

 moderately deeply striate; striae impunctate, the scutellar stria without ocellate 

 puncture at base, the eighth with the row of ocellate punctures rather narrowly 

 interrupted at middle; intervals nearly flat. Body beneath piceons, impunctate, 

 the posterior ventral segments slightly paler; prosternnm rounded at tip. Legs 

 rufopiceous, the anterior and middle femora with numerous, the posterioi- with 

 two setigerous punctures along the inner margin ; tarsi not grooved. Length 

 .35-.50 inch ; 8.75-12.5 mm. 



The males have a hirge, deep puncture at the middle of the })ro- 

 .sternum. The posterior tihite are densely ])ubescent on the inner 

 side, and the i)ubescence in this species and the next is longer than 

 usual. 



Distinct from all our other species, except insularif^, by the pecu- 

 liar prostei'nal character of the males. From the latter it is readily 

 recognizable by the characters given in the table. 



It occurs in California and Alaska. 



