NORTH AMERICAN COLEOPTERA. 47 



Thorax distinctly longer than wide. 



% . Eamus of third joint arising a little behind the distal end ; last joint 



as long as the five preceding coiicolor % . 



9. Third joint distinctly prolonged, the fourth with a process half as 

 long as the fifth joint : last joint as long as the two preceding. 



concolor 9 ■ 

 Thorax as wide as long. 



% . Ramus of third joint near the end ; last joint as long as the four 



preceding eplieiiieroides % . 



9 . Joints 3-4-5 with free angle not i)rolonged. the sixth slightly, the 

 rami of the following joints gradually longer, but in no case longer 

 than the joint ; last joint as long as the two preceding. 



eplieineroides 9 • 



D. bicolor Newm., Ent. Mag. v. p. 375; canadensis Lee, Proc. Acad. 1855. 

 p. 275. 



This species is usually known under the latter name and credited 

 to Latreille. The latter author never named the species, and the 

 first mention of the name is in Encyc. Meth. Ins. x, p. 261, where 

 there is also no description. To Newman we owe the first description 

 — brief, but sufficient. 



The thorax, scutellum, underside of body and legs are rufotesta- 

 ceous, the rest of the body piceous. Thorax sparsely punctate. 

 Elytra moderately coarsely and clo.sely punctate, the surface with 

 short, semi-erect brown hair. Length .32 — .55 inch ; 8 — 14 mm. 



The males are always smaller and have a narrower and less coarsely 

 piuK'tured thorax. The fifth ventral is broadly, but not deeply emar- 

 ginate, the sixth, usually visible, feebly emarginate. In the females 

 the fifth segment is broadly obtuse, the sixth not visible. The eyes 

 are large and contiguous on the front as in all the species of the 

 genus, while the female eyes are moderately separated. 



Occurs from Canada to Florida and westward beyond the Missis- 

 sippi River. 



D. picipes Horn, Traus. Am. Ent. Soc. 1880, p. 154. 



This species is almost entirely piceous, the scutellum, pro- and 

 mesothorax, femoi-a at base and anterior coxas rufotestaceous. The 

 thorax is smooth, as in the following species, the elytral sculpture 

 denser and coarser than in bicolor, which it otherwise resembles. 

 Length .42 — .51 inch; 11 — 18 mm. 



In the male the fifth ventral segment is truncate, the sixth feebly 

 notched at middle. 



Occurs in Washington Territory and northern California. 



