CURCULIONIDAE. 469 



Legs stout, or strong; tibijE armed with a strong hook at tip; 

 articular face lateral; terminal edge of hind tibiae double, except 

 in Pissodes; tarsi with third joint dilated, spongy beneath; claws 

 simple, divergent. 



The species are of moderate size, never very small, and are 

 subcortical in their habits ; they mostly infest coniferous trees. 



This tribe leads directly to the Erirhinini, from which they 

 differ chiefly by the less delicately organized mouth, and gener- 

 ally stronger and coarser structure, and by the double edge or 

 corbel to the terminal margin of the hind tibia. This character, 

 common in Otiorhynchidoe, now reappears for the last time in the 

 present family. 



These corbels are very large and wide in Pachylobius, but 

 narrow in the other genera. 



Mesosterniim moderately long. 2. 



Mesosternum very short. Plinthus. 



2. Front coxse contiguous. 3. 

 Front coxae slightly separated. Fissodes. 



3. Thighs clavate, strongly toothed. 4. 

 Thighs feebly clavate, not toothed. 6. 



4. Tibise of usual form. 5. 

 Tibiae short and very thick. Pachylobius. 



5. Body with spots- of fine pubescence. Hylobius. 

 Body with spots of small scales. Hilipus. 



6. Eyes small, elytra oval, convex. Hypomolyx. 

 Eyes larger, elytra elongate, parallel. Eudocimus. 



Except Plinthus, from the northern part of the Pacific region, 

 and Pissodes, which extends across the continent, these genera 

 occur only in the Atlantic region. Ilypomolyx is founded upon 

 Hylobius iJineti (pinicola Couper), which is found also in northern 

 Europe. Hilipus is numerously represented in the tropics, but 

 by only one species in the Southern States. 



Tribe IV.— CLEOXINI. 



The character which distinguishes this from all neighboring 

 tribes, is that the elytra are less extended on the flanks of the 

 metathorax and a1)donicn, so that the lateral angles of the first 

 ventral segment become visible. 



The body is never very stout, and frc(iuently is almost linear. 

 The gular peduncle is sometimes short, sometimes long, emargi- 



