CURCULIONIDAE. 495 



Group I. — Barides. 



The separation between this group and the Centrini is not verv 

 definite, though characters such as the peri)eiidicu]ar pyg-idiuni, 

 and the shorter and stouter beak, seen in most of the species, do 

 not occur in the last-named group. The main cliaracter to be 

 relied on, in the absence of the easily recognized habitus, is tliat 

 the elytra are more broadly separately rounded at tip, and the 

 pygidium thus becomes more exposed. 



Pygidium oblique; filth reiitral segnaeut longer, rounded at tip: outer 

 joints of funiule but little broader, club large, elongate-oval, pubes- 

 cent. 2. 



Pygidium vertical ; fifth ventral segment shorter, subtruncate. 3. 



2. Beak long, slender, straight. Orthoris. 

 Beak shorter, less slender, curved. Rhoptobaris. 



3. Club annulated, entirely pubescent. 4. 

 Club with first joint larger, shining, claws divergent. Baris. 



4. Claws approximate, frequentlj* connate. ,5. 

 Claws divergent, larger, last joint of tarsi longer than usual. 7. 



5. Front coxre widely distant, body nearly glabrous. (>. 

 Front coxre not widely distant, body densely scaly. Trichobaris. 



6. Prothorax strongly constricted near the tip. . 8. 

 Protliorax feebly constricted ne^ar the tip. Pseudobaris. 



7. Second joint of funicle not longer than third. Oilychobaris 

 Second joint of funicle longer. Au !o baris- 



8. Front thighs not toothed. Ampeloglypter. 

 Front thighs obtusely toothed. Madarus. 



Orthoris Crotchii is found from New Mexico to California; 

 Pseudobaris, Ampeloglypter, and Madarus belong to the Atlantic 

 region; llhoptoharis canescenn occ\n?> in Colorado. The other 

 genera extend from the Atlantic to the Pacific. 



Group II.— Centrini. 



The only characters we can give for the recognition of this 

 group, as distinguished from Barides, are: the elytra conjointly 

 rounded at tip, or nearly so; the pygidium thus becomes entirely 

 coveretl, or only partly exposed, and is nearly horizontal, or at 

 most somewhat oblique, and never vertical. The last ventral is 

 consequently regularly rounded at tip, never truncate or emargi- 

 nate. In addition to these characters the ventral surface of the 

 abdomen is more convex, frequently ascends obliquely, as in 

 Zygopini, but in a much less degree. The tibial hooks are less 



