Feb., 1915 Bulletin of the Brooklyn Entomological Society 19 



coarsely deeply and quite regularly punctured over entire surface, 

 the basal depression cribrate. 



Elytra in most cases not wider than thorax, moderately convex, 

 deeply striate, striae coarsely and serrately punctured, intervals 

 moderately convex, at apex flatter and very finely uniseriately 

 punctured. 



Body beneath moderately punctured. 



Length 4.5-5.5 mm., breadth i mm. 



Occurs from Canada to Georgia and Missouri, N. Mexico and 

 Arizona (Snow). This is apparently the commonest species in 

 eastern North America. This species, though variable, should be 

 readily separated by its convex thorax and peculiar rostrum from 

 any of the other species found in its territory. The form from 

 the Southwest cited, may prove to be not concinnus. It has been 

 found under the bark of dead chestnuts in Pennsylvania by Mr. 

 H. W. Wenzel. It no doubt also lives in other hardwoods. 



I have previously stated that I believe Cossonits imprcssifrons 

 Boh. to be but a variety of the above. If I am correct, this latter 

 name will have priority over C. concinnus by several pages and 

 C. concinnus will then have to be considered as the variety. Good 

 series from near Harrisburg, Penn., show many individuals with 

 the thorax less globose and flatter than in typical examples, with 

 a very much more evident basal thoracic carina, and certain speci- 

 mens have the thorax evidently narrower than the elytra. These 

 seem to me to be what Boheman had and they came from the 

 same territory where presumably Dr. Zimmermann secured his 

 specimens. I give the original description of C. imprcssifrons 

 for the sake of comparison : 



" Cossonus impressifrons — Elongatus, niger, sub-nitidus, glaber, 

 supra parum convexus, antennis pedibusque nigro piceis ; f route 

 foveolate ; rostra brevi crasso, apice obsolete carinato, basi, modice 

 bi-sinuato ; elytris confertim punctato striatis, interstitiis angustis, 

 convexis, laevibus. 



" Patria, Pennsylvania. A Dom. Zimmermann benevole com- 

 municatus. M. Schoh. 



Rhyncholo chloropo nonnihil minor magis depressus, frons 

 profunde foveolata, thorax latior, profundius punctatus, etc. 

 Caput oblongum, nigrum, nitidum, inter oculos foveola oblonga. 



