226 AMERTCAN COLEOPTERA. 



Smaller; head and thorax brownish, elytra darker, shining: sides of thorax 

 oblique behind, at most feebly sinuate in front of the hind angles, 

 which are obtuse, but slightly prominent. Length .09-. 10 inch. 



ventricosus Lee. 



4. Elongate; head and thorax piceous or rufo-pieeous, the latter rarely paler, 



elytra testaceous, usually with an ill-defined discal cloud behind the 

 middle; thorax about one-half wider than long, sides more or less 

 sinuate behind, hind angles subrectangular ; elytra usually with the 

 two inner stria? distinct, the others feeble or nearly obsolete. Length 



.11-. 13 inch proximus Say. 



Broader; testaceous; thorax twice as wide as long, sides not sinuate behind, 

 hind angles obtuse, slightly rounded ; elytra more than one-half wider 

 than the thorax. Length .12 inch hit ipemiis n. sp. 



5. Males with the basal joint of the anterior tarsi normally dilated 6. 



Males with the inner angle of the dilated basal joint of the anterior tarsi pro- 

 longed in a spiniform process 9. 



6. Prothorax as wide at base as apex 7. 



Prothorax narrower at base than apex 8. 



7. Form nearly as in proximus: color usually more reddish, the discal cloud bet- 



ter defined and extending to the sides; thorax rarely darker than the 

 elytra, nearly twice as wide as long, sides at most obsoletelv sinuate 

 behind, hind angles obtuse; elytra usually more deeply striate. 

 Length .10-.12 inch scitulus Lee. 



Smaller; testaceous, the head and sometimes the elytra darker; thorax nearly 

 twice as wide as long, sides not sinuate behind. Length .07.09 inch. 



vorav Lee. 



Elongate; testaceous, the elytra often with faint, ill-defined discal cloud or 

 rarely rufo-pieeous ; thorax about one-half wider than long, sides sinu- 

 ate behind, hind angles obtuse. Length .07-.09 inch. puiiiiliiM Dej. 



8. Slender; piceous or nearly black ; sides of thorax distinctly sinuate behind, 



hiud angles obtuse, but slightly prominent; elytra with at least the 



two inner stria} distinct. Length .07-. 08 inch edax Lee. 



Head piceous, thorax yellow, elytra brownish, the latter subopaque; sides of 

 thorax oblique behind; hind angles obtuse; elytra with the sutural 

 stria only distinct. Length .09 .10 inch coluiiibieiisis n. sp. 



9. Moderately elongate, subdepressed ; color varying from piceous to dark rufo- 



testaceous; thorax one-half wider than long, as wide at base as apex, 

 sides at most obsoletely sinuate behind, hind angles obtuse. Length 

 .09-. 11 inch corruscus Lee. 



35. T. albipes Lee. —Form elongate, very slightly convex. Color piceous 

 or nearly black, shining, the elytra alutaeeous, usually slightly iridescent, with 

 more or less silken lustre. Head as wide as the thorax at apex ; eyes large and 

 prominent; antenna? nearly one-half the length of the body, fuscous; palpi 

 rufous. Prothorax subquadrate, as wide at base as apex, nearly twice as wide as 

 long; apex nearly truncate ; anterior transverse impression nearly obsolete, the 

 posterior deep; median line fine, abbreviated at each end; basal impressions 

 small ; base truncate, obliquely so each side; sides with the margin narrowly re- 

 flexed, arcuate in front, oblique behind ; bind angles very obtuse, nearly obliter- 

 ated, not carinate. Elytra nearly oval, about one-half wider than the thorax. 



