1873.] <±OJ [Horn. 



Mosc. 1843, II, p. 293 ; scroMculatm Lee. Proc. Acad. 1859, p. 283 ; Col. 

 Kansas, p. 18; ? calif ornicus Motsch. Bull. Mosc. 184-3, 1, p. 99. 



Black, shining. Rostrum scarcely longer than half the thorax, apical 

 portion quadrangularly dilated and longer than the basal portion, surface 

 sparsely punctured, feebly canaliculate. Thorax oblong, narrower in 

 front, sides feebly arcuate and gradually divergent to base, apex truncate, 

 base feebly bi-sinuate and on each side feebly impressed, median line im- 

 punctured, surface feebly depressed, coarsely and deeply but sparsely punc- 

 tured. Elytra slightly wider than the thorax, surface feebly depressed, 

 deeply striate, striae wider and deeper at base, coarsely punctured, inter- 

 vals moderately convex, very minutely sparsely punctulate. Body 

 beneath black, shining, sparsely puncturecL Length. 14-. 18 inch ; 3.5-4.3 

 mm. 



This species resembles crenatus, but may be readily known from all 

 the species which follow, by the punctures of the strise being coarse 

 and each one distinct, all the others having the punctures finer and very 

 closely placed. I have before me a typical specimen sent by Mannerheim 

 and also the type of scrobiculatus, and the only observable dilference being 

 in the better developed form of the latter, the former being smaller and 

 piceo-rufous. 



Occurs in California and Oregon. 



C. coneinnus Boh. Schon. Gem Cure. IV, p. 1006. 



Moderately convex, black, shining. Rostrum not as long as half the 

 thorax, quadrangularly dilated at apical portion which is longer than 

 the basal, surface sparsely punctured, base canaliculate, thorax moder- 

 ately convex, longer than wide, median line slightly depressed, sides 

 moderately strongly arcuate, base feebly bi-sinuate, surface coarsely and 

 deeply punctured over the entire surface and in the basal impressions 

 cribrate. Elytra not wider than the thorax, moderately convex, deeply 

 striate, stria" coarsely and serrately punctured, intervals moderately con- 

 vex, at apex flatter. Body beneath moderately punctured. Length .18- 

 .22 inch ; 4.5-5.5 mm. 



Boheman says the antennae are post-median and the third and fourth 

 abdominal segment smooth, neither of which can I detect. This species 

 may be known by its much more convex thorax than any other in the 

 present group. 



Occurs from Canada to Georgia and Missouri. 



It is possible that the species so well described by Boheman (and to 

 which the above is equivalent) as coneinnus is really the true corticola 

 Say, but as Say's types are not extant and the description may be con- 

 strued to fit either the present or the next, I do not deem it advisible to 

 complicate the synonymy by any change based on mere opinion. 



C. corticola Say, Cure. X. A., p. 24; Boh. Schon. Gen. Cure. IV. 

 p. 1005. 

 Piceous, elongate, sub-depressed. Rostrum not as long as half the 



