LeConte.] 



161 



in Rhyncliitidce ; gular peduncle longer than wide, slightly emarginate, 

 mentum small, not transverse, ligula and palpi prominent, smaller than 

 in Hylobiini. The beak is cylindrical, sometimes very long and slen- 

 der, sometimes rather stout; the antennal grooves commence at a dis- 

 tance from the tip, descend obliquely, and sometimes become confluent 

 behind. The antennas are geniculate, the scape long and slender ; 

 funiculus usually 7-jointed, sometimes (Endalus) 6-jointed; club oval, 

 annul atecl, entirely clothed with sensitive surface except in Lissorhoptus. 

 Prothorax with or without postocular lobes; front coxae contiguous, pros- 

 ternum flat, emarginate, or not, in front, sometimes (Bagous) broadly sul- 

 cate for reception of the beak. Mesosternum with the side pieces diago- 

 nally divided, epimera not attaining widely the base of the prothorax. 

 Metasternum usually long, rarely (Phycocwtes) very short; side pieces 

 narrow, dilated in front. Hind coxa3 widely separated, transverse, nar- 

 rower externally, and extending almost to the elytral margin. Legs never 

 very stout, thighs usually simple, rarely (Dorytomus) toothed; tibiae trun- 

 cate at tip and feebly mucronate in most genera, strongly unguiculate in 

 Bagoi. Tarsi usually dilated, narrow in certain genera; last joint some- 

 times long, sometimes short; claws not toothed, divergent, sometimes con- 

 nate (Desmorhines), or single (Brachybamus); last joint wanting in the 

 European genus Anoplus. 



Ventral segments unequal, third and fourth united about equal 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 I have found it neces- 

 sary to establish two others. 



The affinities of the tribe are in several directions: towards the Hylobiini, 

 EmpJiyastini (Phycoc&tes), CeutorhyncMni (Hydronomi). 



Mesosternum as long as first ventral segment, 2. 



very short viii. PHYCOCCETES. 



2. Tibiae truncate at tip, feebly mucronate .... 3. 



" not truncate, strongly unguiculate. . vii. HYDRONOMI. 



3. Eyes contiguous to prothorax 4. 



" distant from " iii. ETJGNOMI. 



4. Body scaly or pubescent 5. 



" covered with a waterproof crust 6. 



5. Beak not constricted at base; claws diver- 



gent i. EBIBHINI. 



Beak strongly constricted at base : claws 



connate or approximate ii. DESMORHINES. 



6. Tarsi with third joint bilobed 7. 



' " " " simple ; beak short 



and stout iv. STENOPELMI. 



7. Last joint of tarsi short v. CRYPTOPLI. 



" " " " long vi. BRACHYPI. 



PROC. AMER. PHILOS. SOC. XV. 96. U 



