472 COLEOPTERA OF NORTH AMERICA. 



to the second or fifth ; sutures straight, excepting the first which 

 is sinuate in most genera, and the last, which is broadly curved 

 in Stenopelmus. 



Our genera are numerous, and indicate several groups; in fact, 

 all of those recognized by Lacordaire are represented, and we have 

 found it necessary to establish two others. 



The affinities of the tribe are in several directions ; towards 

 the Hylobiini, Emphyastini (Phycocoetes), Ceutorhynchini (Hy- 

 dronomi). 



Metasternum as long as first ventral segment. . 2. 



Metasternum very short. VIII. Phycocoites. 



2. Eyes contiguous to prothorax. 3. 

 Eyes distant from the prothorax ; 



Third tarsal joint bilobed ; tibire truncate. III. Edgnomini. 



Third joint feebly emarginate ; tibije feebly emarginate. 



V. Stenopelmi. 



3. Body scaly or pubescent. 4. 

 Body with waterproof crust. 5. 



4. Beak not constricted at base ; claws divergent. I. Erirhini. 

 Beak strongly constricted ; claws connate or approximate. ' 



II. Desmorhines. 

 .'). Tarsi with third joint bilobed. 6. 



Tarsi with third joint simple. VII. Hydronomi. 



6. Last joint of tarsi short. IV. Cryptopli. 



Last joint of tarsi long. VI. Brachypi. 



Group I. — Erirhini. 



The species hare the beak long, usually slender, the; mandibles 

 with two sharp teeth at the end; the inferior cusp in Erycus 

 comes to the outer margin, and is not very prominent, but thus 

 shows a tendency to assume the position which it has in the. next 

 group. The antennal grooves are directed against the eyes, and 

 do not converge beneath. The scape nearly or quite attains the 

 eyes, and the first, and usually the second joint of the funicle are 

 longer than the others. The mesosternum is as long as the first 

 ventral ; the legs are slender, tibiae truncate at tip, and feebly 

 mucronate; the tarsi are spongy beneath, with the third joint 

 dilated and bilobed ; last joint long, claws rather strong, simple, 

 divergent. 



This group recedes in the direction of the Phytonomini and 

 Hylobiini.* 



* The following species do not belong to this tribe : Erirhimis rpMppiahts 

 Say, has the thigjis not toothed, and the claws broadly appendiculate ; 



