154 JOHN L. LECONTE, M. D. 



*"-■■'* Posterior declivity of elytra with subsutural tubercles: 



4. C. dentiger. — Slender cylindrical, not very shining, nearly glabrous, dark 

 brown, posterior half of prothorax, antennfe and feet brownish-yellow: head 

 flat, opake, finely punctured ; prothorax nearly one-half longer than wide, pa- 

 rallel on the sides, obtusely rounded in front, finely roughened in front of the 

 middle, nearly smooth behind; elytra very indistinctly and sparsely punctu- 

 late, posterior declivity slightly concave, elevated margin acute below, then ris- 

 ing into a small acute cusp, then becoming thick and retuse for a short distance, 

 then armed near the suture with another small acute cusp or small spine; the 

 suture is not elevated, and near it on each side, about the 2nd third of the de- 

 clivity is a small rounded subacute tubercle. Long. 2 mm. 



One specimen from middle California given me by Dr. Horn. This 

 species is of the same size and form as C. mali, but differs in the pos- 

 terior declivity of the elytra, as above described, being concave and 

 broadly retuse at its lateral margin. 



5. C. mali. (Ante, p. 143.) 



To the 2nd subgroup, or Corfhi/las proper, belongs only 



6. C. punctatissimus Zimm. (Ante, p. 144.) 



B. — Funiculus of antennae 2-jointed, body stout, head large, promi- 

 nent, and deflexed. 



But one species of this group is known to me : 



7. C. dissimilis Zimm. (Ante, p. 144.) 



This differs remarkably from the others in form, and resembles 

 somewhat the figure of H/ypofhonemiis in DuVal, Gen. Col. Eur. iv, pi. 

 33, fig. IGl, but is stouter. 



C. — Funiculus of antennae 4 or 5-jointed, (except in No. 16,) outer 

 joints closely connected with each other, forming a pedicel to the club. 



Several subgroups may be recognised, and the species tabulated for 

 convenient reference as follows: 



* Club of antenuse feebly annulated, more shining; elytra shining, scarcely 

 punctured : 



Posterior declivity of elytra strongly retuse 8. retasus. 



Posterior declivity of elytra feebly retuse 9. sulcatus. 



Posterior declivity of elytra not retuse : 



Thorax moderately rough in front 10. materiarius. 



Thorax very rough in front, (very small) 11. asperulus. 



•-S- Club of antennae distinctly anuuldted, less shining, sutures transverse near- 

 ly straight: 

 a, Elvtra finely punctulate and pubescent: 



Pubescence of elytra short and fine 12. minutissimus. 



Pubescence of elytra longer and coarser 13. pubipennis. 



Pubescence of elytra sparse and body more slender.. 14. pilosus. 

 h. Elytra Avith rows of quadrate punctures, posterior declivity notsulcate. 



Elytra with rows of short stiff bristles 15. hispidulus. 



Elytra with rows of short very fine hairs 16. striatus. 



