184 CUECULIONIDJE. 



[LeConte. 



The species may be thus separated : 



Third joint of tarsi broader, emarginate 2. 



"' " narrow, not emarginate 5. 



2. Elytra each with one posterior tubercle 3. 



" two " tubercles 1. mammillatus. 



3. Interspaces equal, flat, or nearly so 4. 



Alternate interspaces more elevated 2. sellatus. 



4. Scales uniform pale gray, striae less deep 3. planatus. 



" gray and dark brown ; striae deeper 4. obliqmis. 



5. Tarsi very long, prothorax finely rugose 5. americanus. 



" short ; prothorax scarred with deep im- 

 pressions 6. 



Tarsi short, or moderate, prothorax strongly 

 granulate 7. 



Tarsi short, or moderate, prothorax feebly granu- 

 ulate 8. 



6. Front deeply excavated, beak tricarinate., 6. cavifrons. 



" foveate, beak tricarinate 7. magister. 



7. Elytra clouded with darker scales; beak long, 



tarsi short 8. nebulosus. 



Elytra uniform in color ; beak short, tarsi long. . 9. californicus. 

 ' ' with a white spot behind , beak short, tarsi 



long 1(5. restrictus. 



Elytra with a broad black band, beak short, tarsi 



long 11. pusillus. 



8. Prothorax not transverse 12. bituberosus. 



" wider than long, much constricted in 

 front 13. transversus. 



1. B. mammillatus Say, Cure. 28, ed. Lee. i, 297; Gyll., Sch. Cure, 

 iii, 539. 



Southern and Western States. Varies in size from 2. 4-3 mm. ; .09-1.3 

 inch. 



2. B. sellatusi n. sp. 



Black; head, three thoracic vittse, sides and tip of elytra densely cov- 

 ered with cinereous scales, leaving a large elongate common triangular 

 space black. Prothorax a little longer than wide, coarsely granulate, sides 

 parallel, suddenly constricted near the tip. Elytra with the humeri oblique 

 and obtusely angulated, striae deep, -interspaces convex, first, third, and 

 fifth more elevated, the last terminating in a large conical tuberosity, which 

 is surrounded behind by a dark cloud. Beneath fuscous, thighs with a 

 ring of paler scales. Tarsi with the third joint broader, emarginate. 

 Length 2.5 mm.; .10 inch. 



One specimen, Georgia. The common triangular spot extends from the 

 humeri to the suture upon which it ends at about two-thirds the length ; 

 there is also on each elytron a marginal cloud behind the humerus, and a 

 small subapical one behind the large tuberosity. 



