THE LEAP BEETLES. 



L209 



e. Form elongate, subcylinclrical. subcylindrica. 

 ee. Form regularly oval. irregulajus. 

 cc. Rows of elytra] punctures regular. 



/. Form elongate-oval, more than twice as long as wide; piceous, 

 surface bronzed ; apical portion of antenna? and all the femora 

 Piceous. 2284. protensa. 



//. Form oval, not twice as long as wide. 

 g. Punctures of head distinct. 



//. Punctures of the front and clypeus dense and rugulose ; sur- 

 face subopaque. 2235. denticulata. 

 hh. Punctures of the front and clypeus coarse, well separated; 

 surface shining. 2236. cribrifrons. 

 gg. Punctures of head small, indistinct. 



i. Punctures of elytral striae well impressed to apex ; thorax 



with a distinct basal row of punctures. 2237. minuta. 



ii. Punctures of elytral striae feebly impressed, nearly obsolete 



at apex ; basal row of thoracic punctures very feeble. 



2238. pinguis. 



l)b. Head absolutely without punctures. 



j. Thorax with an entire basal marginal line, which is not defined 

 by punctures ; color brassy bronze ; scutellar stria regular. 



2239. OPULENTA. 



jj. Thorax with a basal marginal row of punctures. 



k. Thorax shining, minutely alutaceous. 2240. parcepunctata. 

 IcJc. Thorax subopaque, distinctly alutaceous. 2241. pulicaria. 



act. Sides of thorax obliquely truncate at the front angles and with an 

 angulation in front of middle ; thorax without basal marginal line. 



2242. confinis. 



C. cribata Lee, brassy-bronzed, antenna?, tibia? and tarsi reddish- 

 yellow, length 2 mm., is known from Massachusetts and Oregon. C. 

 subcyUndrica Lee, piceous, feebly bronzed, length 2-2.5 mm. ; and 

 C. irregularis Lee, piceous, distinctly bronzed, length 2 mm., are 

 known to occur in Michigan. 



2234 (7042). Chjetocnema protensa Lee, Proc. Amer. Phil. Soc, XVII, 

 1878, 417. 



Form given in key. Piceous, distinctly brassy-bronzed; tibiae, tarsi and 

 basal half of antenna? reddish-yellow. Head coarsely, not closely punctate. 

 Thorax one-third wider at base than long, sides regularly curved, feebly 

 narrowing to apex; disk minutely alutaceous, rather finely and sparsely 

 punctate. Elytra slightly wider at base than thorax, with regular rows of 

 rather coarse, close-set punctures; intervals flat, wider than strife, without 

 punctures. Length 2.5-2.8 mm. 



Lake County; rare. October 6. Ranges from Maryland and 

 Michigan westward to Colorado. 



