510 COLEOPTERA OF NORTH AMERICA. 



of his Pentarthrides. The second genus would probably go near 

 Lymantes, which is thus far unknown to us, and may perhaps 

 have some relation to tlie European Styphloderes. 



Besides the more slender beak and the crusty covering these 

 insects differ from those of the following two tribes by the head 

 being rather peculiarly constricted behind tlie eyes, which are 

 small, rounded, and very coarsely granulated; the result of this 

 form of head is that the eyes are situated on the beak instead of 

 at the sides of the cranium proper. The scutellum is not visible 

 in either of our genera, and we are inclined to believe that this 

 will be found a character of the group, permitting the association 

 of forms not widely separated. 



AntennEe with 5-jointed fiinicle. Dryotribus. 



AnteiiniB with T-joiiitcd fuuicle. Gouocotus. 



The two species, one of each genus, are found in Florida. 



Triho II.— COSSOXIXI. 



We associate as a distinct tribe certain other genera, which 

 have not the body covered with a crust, but shining and bare; 

 some of the foi'eign genera are more or less setose, but ours are 

 glabrous, with the exception of Himntium. 



The beak is never very short, and is frecpiently dilated at tip; 

 the antennae are inserted near the tip or at the middle ; the 

 antennal grooves frequently descend rapidly on the sides of the 

 beak, and sometimes are directed towards the eyes, but the 

 antennte are not received in repose in a deep transverse gular 

 groove as in the next tribe. The club varies in form, and in omv 

 genera the funicle is 7-jointed ; whether any of the genei-a of other 

 countries, with less number of joints in the funicle, belong to the 

 tribe as here constituted, must be determined by subsequent in- 

 vestigations. 



The arrangement here proposed differs radically from that 

 offered by Mr. AYollaston, and, if found in accordance with 

 natural affinities, will result in a great reduction of the number 

 of genera. 



The genera we have recognized in our fauna are as follows: — 



Body glabrous. 2. 



Body pubescent. Himatium. 



