NORTH AMERICAN COLKOPTKRA. 31 



with group of fine punctures in the male, sometimes very indistinct, 

 the tip with marginal line, but without the setigerous punctures. 



As far as known to me from the memoirs of Zimmermann and 

 Putzeys, this grouj) is peculiar to our fauna. The apex of the 

 thorax is very feebly emarginate. The disc of the thorax is regu- 

 larly convex, without trace of lateral depression, except feebly near 

 the hind angles. As in the remotestriata series both sexes have two 

 .setigerous punctures on each side of the apex of the last ventral 

 segment, except robuslula. 



Surface piceous or brownish, witb, at most, but a feeble trace of metallic lustre; 

 sentellar stria loiifi, usually entire, never free at both extremities at the 

 same time. 

 Form rather broadly oval, not twice as long as broad. 



Legs rufo-testaceous ; males with two anal setse each side clialcea. 



Legs piceous black ; males with but one seta each side robu!i»tula. 



Form oblong, twice as long as broad. 



Elj-tra as wide at base as the base of thorax ; thorax not one-half wider than 



long; legs piceous-black reotaiigllla. 



Elytra wider at base than the base of thorax; tliorax nearly twice as wide 

 as long at its widest part. 



Legs piceous; thorax scarcely narrowed in front iliipera. 



Legs rufo-testaceous; thorax distinctly narrowed in front gibba. 



Surface very shining, rather brightly metallic, form and facies very like (mrata ; 

 scutellarstriaalwaysmuch broken, imperfect and indistinct. iiiiitalrix. 



A. chalcea Dej. — Form rather more broadly oval than remotestriata and 

 more convex, piceous, shining in both sexes, surface slightly bronzed. Antennae 

 pale. Head smooth, front with deep, but small frontal depressions. Thorax not 

 twice as wide at base as long at middle, feebly narrowed in front, apex feebly 

 emarginate, the angles not prominent to the front, sides arcuate nearly from the 

 base, hind angles rectangular, disc convex without trace of depression at the 

 sides, near the base on each side with two fovese both rather large and deep, and 

 coarsely punctured. Elytra finely, but sharply striate, the striie not punctured, 

 intervals flat in both sexes. Body beneath piceous black, smooth, shining, 

 usually with coarse punctures at the sides of the first segment. Length .'26 — 

 .28 inch.; 6.5— 7 mm. 



The scutellar stria is long and entire; the ocellate punctures are 

 somewhat interrupted at the middle of the eighth stria. At the ti]) 

 of prosternum the marginal line is distinct and the setigerous punc- 

 tures entirely wanting. 



The middle and posterior tibiae of the male have scyrcely any 

 trace of arcuation. 



This species could only be mi.xed with reinotedriuta, than which it 

 is broader and more convex, without lateral depression of the thorax 

 and without setigerous punctures at the tip of the prosternuu). 



TRANS. AM. KNT. SOC. XIX. FKBRUAKY, 1892. 



