138 CURCULIONIDJE. 



[LeConte. 



of the following tribes, modified only by the greater development of the 

 inferior edge and cusp, which by assuming more prominence gives finally 

 an oblique form to the mandible. The gular peduncle is longer than wide, 

 a little wider in front, truncate anteriorly; the mentum is transverse, not 

 large, and the palpi are rather more developed than in the following tribes. 

 The beak is rather long, not slender, except in Pissodes, and the antennal 

 grooves do not extend to the tip. Eyes transverse. The antennie are 

 geniculate ; scape long, funiculus 7-jointed, club oval, pointed, annulated, 

 entirely pubescent and sensitive, except in Pissodes, where the first joint 

 is smooth and sub-glabrous. 



The front coxae are contiguous and the cavities confluent, except in 

 Pissodes, where they are slightly separated. The middle coxiE are not 

 widely separated; the side pieces of metasternum diagonally divided, with 

 the epimera triangular, not attaining largely the base of the prothorax. 

 Side pieces of metasternum narrow, slightly dilated in front. Hind coxae 

 widely separated, attaining the lateral margin, or nearly so. 



Ventral segments unequal, first, second and fifth longer; sutures straight 

 and deeply impressed, except the first which is finer and sometimes 

 slightly sinuate. Pygidium covered b}^ elj^tra. 



Legs stout, or strong ; tibite armed Avith 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 sub-cortical 

 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 generally stronger and coarser 

 structure, and by the double edge or corbel to the terminal margin of the 

 hind tibia^. This character, common in Otiorhynchidae, 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. 



Mesosternum moderately long 2. 



" very short Plinthus. 



2. Front coxae contiguous 3. 



" " slightly separated Pissodes. 



3. Thighs clavate, strongly toothed 4. 



" feebly clavate, not toothed 6. 



4. Tibiae of usual form 5. 



" short and very thick Pachylobius. 



5. Body with spots of fine pubescence Hylobius. 



" " " small scales Hilipus. 



6. Eyes small, elytra oval, convex Hypomolyx. 



" larger, elytra elongate, parallel Eudocimus. 



PLINTHUS Germ. 



A single species of this genus, Avhich is easily recognized by the very 

 short metasternum, occurs in Oregon and Alaska. It is very roughly 



