CURCULIONIDAE. 481 



by deep straight sutures, usually nearly equal ; third and fourth 

 segments short in Elleschus; legs rather long; thighs frequently 

 chivate and toothed; front and middle tibiee with terminal hooks; 

 hind tibife mueronate at tip, articular surface apical, and not 

 lateral. Tarsi spongy beneath, third joint broad, bilobed, claws 

 cleft, toothed, or appendiculate. The elytra are separately rounded 

 at tip, so afS to expose a i)ortion of the pygidium in most of the 

 species, but conjoint!}' rounded in Macrorhoptus and Elleschus; 

 this exposure of the pygidium is however so slight in some 

 species that it is evidently a character of no importance. 



Prostenium long in front of the coxre. 2. 



Prosternnm short, broadly emarginatc. 3. 



2. Claws simple ; pygidium slightly exposed. Acalyptus. 

 Pygidium more or less exposed ; claws toothed. 3. 

 Pygidium entirely covered. 5. 



3. Pygidium and last ventral of % normal. 4. 

 Pygidium of '^ perpendicular, last ventral short, emarginate. 



Coccotorus. 



4. Eyes rounded distant, hind thighs normal. Anthononiiis. 

 Eyes approximate above, hind thighs thickened. Orchestes, 



ij. Ventral segments nearly equal ; claws toothed. Macrorhoptus, 



Ventral segments very unequal ; claws aj^pendiculate. Elleschus. 



Coccotorus has. one species in the Atlantic region; the other 

 genera extend across the continent. Alyca Lee. is the same as 

 Elleschus. 



Tribe X.— PRIOIVOMERIIVI. 



This tribe contains a few small species of robust form, easily 

 known by the following assemblage of characters : — 



Beak stout, sometimes short and flat; antennae inserted about 

 the middle, scape extending upon the eyes which are large and 

 rounded; funicle 7-jointed, club very large, pubescent, oval- 

 pointed, almost articulated. Prothorax without postocuhir lobes, 

 front coxa3 contiguous; prostenium short, not emarginatc. 



Yenti'al sutures deeply impressed ; the first is straight, the 

 others strongly angulated at the sides ; fifth segment scarcely 

 longer than the fourth. Legs stout, tibia9 with a slender terminal 

 hook; tarsi dilated, spongy beneath; third joint bilobed, claws 

 ajjpendiculate. Pj'gidium mon^ or less visible. 

 15eak as long as prothorax, subcylindrical ; long ; front thiglis with a lai-ge 



.serrated tooth. Prionomerus. 



Beak short, broad, and flat; thighs with a small acute tooth. 



Piazorhinus- 

 31 



