394 Mr. G. A. K. Marshall on the 



14. (11.) Prothorax -with the smooth discal areas 



impuactate. 



15. (18.) Forehead with a distinct central fovea ; 



central carina ofpruthorax very narrow, 

 obsolete or incomplete. 



16. (17.) Forehead with a shallow transverse im- 



pression; thoracic impression narrower, 

 deeper, more sharply V-shaped, and 

 w ithout a central carina ; elytra black. 6. C. tra7\si'aahnsis, 



17. (16.) Forehead without a transverse impres- [sp. n. 



sion ; thoracic impression broader and 

 shallower, and with an irregular cen- 

 tral carina ; elytra ferruginous brown, 

 with the suture and lateral margins 

 black 7. C. suturalis, Roh. 



18. (15.) Forehead with no central fovea; cen- 



tral carina of prothorax complete, 



broad and impunctate 8. C. uvizila, sp. n. 



19. (10.) Elytra ^^ith 10 complete striae ; the cen- 



tral impression on prothorax trans- [sp. n. 



versely interrupted about middle .... 9. C. chinndensis, 



20. (9.) Rostruni with a ccntial furrow at base . 10. C. ehngntulus, F. 



21. (8.) Prothorax plane and smooth, without a 



carina or any distinct impressions ; 

 body much depressed. 



22. (23.) Rostrum longer than head and only 



slightly dilated; head short, sub- 

 conical; elytra with 9 shallow striie, 

 the intervals being broad and plane . . 11. C.fflabricoUis,Boh. 



23. (22.) Rostrum shorter than head and broadly 



dilated ; head elongate, subquadrate ; 

 elytra with 10 deep stricTe, the intervals 

 narrow and subcarinate 12. C. co7nplanatus, 



24. (1.) Rostrum subcylindrical, not dilated at [sp. n. 



apex. 



25. (26.) Rostrum impunctate dorsally ; central 



impression on prothorax at base only, 



the median carina indistinct anteriorly. 13. C. immeritus, 



26. (25.) Rostrum punctate dorsally ; central im- [FShr. 



pression on prothorax reaching from 



case to apei, the median carina distinct [sp. n. 



throughout 14. C. scrobicollis, 



1. Cossonus ahscissus, Boh. 



Cossonus abscissus, Boh. Schbn. Gen. Cure. iv. p. 1036 (1838) ; Gerst. 

 Wiegm. Arch. 1871, i. p. 76. 



Long. 5^-7, lat. l|-2 mm. 



Head subconicalj obsoletely punctate on vertex, forehead 

 strongly punctured and with a broad central impression con- 

 taining a deep round fovea; eyes slightly prominent. Bos- 

 trum stout, about as long as broad, scarcely curved, strongly 

 diluted from base to apex ; upper surface with a central 

 impression (continued from forehead) at the base only, plane 



