484 COLEOPTERA OF NORTH AMERICA. 



the female, with the antennoe of usual form, inserted near the 

 mouth in the former, and at the middle in the latter sex; 

 scrobes at the sides of the beak; iuiiicle 7-joiuted. Prothorax 

 wide, narrowed in front, rounded at the sides; prosternuni wide 

 between the coxffi, flat, in the same plane as the nieso- and meta- 

 sternuiB. Scutel distinct. Pygidium covered by the elytra. Side 

 pieces of mesosternum not interposed between the elytra and base 

 of prothorax. Legs short, front coxas widely separated; front 

 thighs stout, armed with a tooth beneath ; tibite unguiculate at 

 tip; claws simple, divergent. Metasternum long, side pieces 

 moderately wide. Ventral sutures straight, 1st and 2d segments 

 very long, connate. 



One species of Nanus from Florida represents this tribe in our 

 fauna. It nearly reseiubles the West Indian A^. inriformis, but 

 differs in being more shining. The genus greatly resembles in 

 appearance a depressed Cossonus, in which faiuily it was placed 

 by Wollastou, under the name Homaloxenus, and so recorded in 

 the Rhynchophora uf America north of Mexico (p. 338). The 

 deceptive appearance is increased by the prothorax having two 

 faint longitudinal impressions, in which the punctures are larger. 



It seems to be related in diverse directions, with the Erirhinini, 

 Derelomini, and elongate species of Centrinus. 



Tribe XIV.— DERELOMIIVI. 



A tribe which contains a few small species of oblong elongate 

 form, glabrous, and feebly punctured, with the hind angles of the 

 prothorax rectangular and better defined than usual. The beak 

 is slender, long, cylindrical, and is usually projected forwards; it 

 can, at most, be bent perpendicularly downwards in repose; the 

 autennal grooves descend obliquely to the lower edge of the eyes, 

 which are moderate in size, nearly round, coarsely granulated and 

 distant from the prothorax. The antenua3, inserted one-fourth 

 from the tip, are slender, the scape reaches the eyes ; the funicle 

 is 7-jointed; first joint stouter, and as long as the two following 

 united ; the second and the succeeding ones become slightly 

 broader, rather closely connected and merge into the club, which 

 is pubescent, elongate, pointed, and strongly annulatcd. The pro- 

 thorax is quadrate for the greater part, then suddenly narrowed 

 to the tip, which is constricted; near the tip there is a short, acute 

 oblique lateral ridge representing a part of what is the lateral 



