Horn.] 44:1/ [Sep, 19) 



tured, finely canaliculate and with an impressed puncture between the 

 eyes. Antenna} stout, slightly po.-t-median, club scarcely broader than 

 the funicle. Thorax longer than wide, apex feebly constricted, sides 

 arcuate, base slightly narrower and feebly bi-sinuate, surface convex, 

 coarsely punctured, median line and an oval space on each side in front 

 of middle smooth. Elytra not wider than the thorax, nearly cylindrical, 

 surface striate, striae moderately deep, moderately coarsely but not ser- 

 rately punctured, intervals feebly convex, irregularly bi-seriately punc- 

 tured, at apex more rugulose. Body beneath moderately punctured. 

 Length .2(5 inch ; (3.3 mm. 



This species is the largest of the tribe in our fauna, and besides the 

 characters above given, differs from every other Cossonus in having the 

 inner angle of the tibia? spiniform. The male before me has the tibia? 

 sparsely fimbriate within. 



One specimen, Delaware. 



C. pinguis, n. sp. 



Reddish brown or piceous, feebly shining, form moderately robust. 

 Rostrum longer than half the thorax, cylindrical, feebly arcuate, sparsely 

 punctured, between the eyes an elongate impressed point. Thorax as 

 broad as long, anteriorly moderately constricted, sides strongly arcuate, 

 base slightly narrowed, feebly bi-sinuate and with an obsolete impression 

 in front of the scutellum, surface moderately and evenly punctured. 

 Elytra not wider than the thorax, moderately convex, stria? moderately 

 deep, at base punctured but neither coarsely nor closely, punctures at 

 apex obsolete, intervals moderately convex, indistinctly punctulate. 

 Body beneath sparsely punctured. Anterior tibia? sinuate within. Length 

 .12 inch ; 3 mm. 



The eighth stria is slightly oblique and joins the seventh slightly 

 behind the humerus, the interval between the ninth and marginal stria? 

 is reduced to an extremely narrow carina. The union of the stria? 7-8 is 

 an unusual character in Cossonus, but is the usual form in lihyncolus. 



Occurs in Georgia and Florida. 



C. dubius, n. sp. 



Reddish brown, feebly shining. Rostrum as long as half the thorax, 

 slightly broader at tip, sparsely and at base more coarsely punctured. 

 Antenna? median, club oval sub-acute at tip. ' Thorax slightly longer 

 than wide at base, sides very feebly arcuate and gradually divergent 

 posteriorly, base feebly bi-sinuate, surface moderately convex, coarsely 

 but not densely punctured. Elyti-a at base slightly wider than the 

 thorax and slightly wider behind, sides straight at apical fourth obliquely 

 narrowed, apex apparently slightly prolonged and obtusely rounded, 

 surface striate, stria? moderately deep and coarsely and sub-seriately 

 punctured, intervals moderately convex, finely uni-seriately punctulate ; 

 outer stria? as in the preceding species. Body beneath coarsely punctured. 

 Length .07 inch ; 1.75 mm. 



The third joint of the tarsi is slightly more dilated than the second. 



One specimen from Illinois or Missouri. 



