226 CUKCULIOXID^. 



[LeConte. 



Costae of elytra abruptly interrupted 2. 



" feebly 4. 



2. Beak stouter, shorter and more curved 3. 



" longer, more slender; elytral band pale yellow 1. juglandis. 



3. Elytral band white 2. albicinctus. 



" " " and yellow 3. nenuphar. 



4. Prothorax carinate 5. 



" with a small, median callus 4. retentus. 



" not or scarcely carinate 6. 



5. Ventral segments coarsely punctured 5. seniculus. 



" " finely and sparsely punctured 6. aflQnis. 



6. Costse of elytra distinct 7. 



" " obsolete, elytra in great part white . . 9. nivosus. 



7. Elytral band well-defined 7. elegans. 



" " not well-defined 8. aratus. 



1. C. juglandis, n. sp. 



Dark brown, varied with black, pubescence fulvous, or dirty yellow, 

 forming a curved bifurcated line each side of the prothorax, and a broad 

 band behind the middle of the elytra. Beak longer than the head and pro- 

 thorax, cylindrical, not stout, shining, sparsely punctured, with a broad, 

 lateral groove, and two short, finer ones near the base. Prothorax coarsely 

 punctured and rugose, with a very short carina before the middle, and four 

 discoidal tubercles; broadly constricted in front. Elytra with striis of large 

 quadrate punctures, alternate insterspaces strongly costate, the third and 

 fifth interrupted forming on each a high crest, with a basal and sub-apical 

 elevation. Ventral segments sparsely punctured, fifth more finely and 

 densely. Legs somewhat annulated, thighs bidentate. Length 7 mm. ; .27 

 inch. 



Middle States, on walnut. This species is closely allied to the plum 

 weevil, C. nenuphar, and has been confounded with it until tlie present 

 time. It is, however, much larger, the beak is longer, more slender, and 

 less curved; the prothorax is broader and more rounded on the sides, the 

 crest of the fifth elytral interspace is longer, almost as large as that of the 

 third, and overlaps it far more than half its length, and finally the pubes- 

 cence is of a nearly uniform color, so that the band of the elytra is not 

 variegated with white. The ventral segments are much less densely punc- 

 tured. It is mentioned as a phytophagic species by Mr. B. D. Walsh, Illinois 

 State Report, 1868, p. 65. 



2. O. albicinctus, n. sp. 



Closely allied to the preceding and next species. Beak longer than the 

 prothorax, stout, curved, deeply striate and punctate. Prothorax as in the 

 preceding, but with a complex line each side of yellow and gray hairs. 

 Elytra as in the preceding, with the crest of the fifth interspace less ele- 

 vated, and scarcely separated from the sub-basal part of the costa : poste- 

 rior band broad, narrower towards the sides, composed of pure white hair; 



