1S73 | "*-±l [Horn. 



This species is the smallest of the present section and is readily known 

 by the sub-carinate median line at base. 

 Pennsylvania (Boheman) and Florida. 



B. 



This group contains one very small species of elongate form, rufous 

 color, and with the rostrum porrected. The scape of the antenna? barely 

 attains the eyes, the scrobes deep, very gradually becoming inferior and 

 more widely separated than usual in the genus. The anterior coxae are 

 widely separated. 



The unique species is referred with doubt to Phlceophagus by Boheman, 

 but the distant anterior coxae forbids such a reference. 



C. pallidus Boh. Schouh, Gen. Cure. VIII., 2, p. 279. 



Linear, rufo-testaceous, depressed, shining. Rostrum cylindrical, 

 feebly arcuate, slightly longer than half the thorax, sparsely punctured, 

 and with an impressed point between the eyes. Thorax oblong, sides 

 gradually divergent from apex, base slightly narrower and feebly arcuate, 

 surface depressed, sparsely punctured, punctures finer in front. Elytra 

 slightly wider than the base of thorax, depressed, striate, striae deeper 

 at apex, moderately punctured, intervals moderately convex, very 

 minutely uni-seriately punctulate. Body beneath sparsely punctured. 

 Length .06 inch ; 1.5 mm. 



This is the smallest Cossonide in our fauna, and is probably the 

 smallest Curculionide. 



Occurs from the District of Columbia southward. 



C. 



The rostrum is cylindrical, slightly arcuate. Scape of antennae im- 

 pinging on the eyes, scrobes moderately deep, rather widely separated 

 at their termination beneath. 



The species of this group appear to approach closely to Phkeopliagus, 

 from which they differ in the widely separated anterior coxae. From all 

 the Cossouus wdiich precede, they differ in their more convex form and 

 more robust facies. I can rind no character worthy of being made use 

 of to separate the species generically. 



Three species form this group, two of small size and a third is the 

 largest in the entire genus in our fauna. 

 Thorax oblong, sides arcuate. 



Color black, species large (.20 inch) subcylindricus. 



Thorax wider than long, sides strongly arcuate. 



Color rufo-piceous, species small (.12 inch) pinguis. 



Thorax conical, sides very feebly arcuate. 



Color piceous, species small (.07 inch) dubius. 



C. subcylindricus, n. sp. 



Black, shining, form subcylindrical. Rostrum slightly longer than 

 half the thorax, very feebly arcuate, terete, surface moderately punc- 

 A. p. s. — VOL. XIII. 3d 



