272 CURCULIONID^. [LeContc. 



thicker, and the second somewhat elongate ; the others differ but little in 

 length. The autecoxal ridges of the prosternum are very well developed, 

 and the front coxae are very prominent and not widely separated. The 

 mesosternum is not properly sulcate, but the middle coxae are large and 

 very prominent, not widely separated, so that there is a narrow deep space 

 between them. The metasternum is very short, and the hind coxae widely 

 separated. The thighs are slightly clavate, not toothed, the tibiae are 

 slender, the tarsi dilated, and the claws cleft. Scutellum not visible ; 

 pygidium exposed. 



1. A. ventricosus, n. sp. 



Ovate, very convex, dark brown, very finely pubescent ; pubescence 

 forming tliree vittae on the prothorax and two bands on the elytra. Head 

 strongly punctured, eyes distant, not convex, beak stout, curved, as long 

 as the prothorax, strongly punctured, striate towards the base. Prothorax 

 wider than long, gradually but strongly narrowed in front, rounded on 

 the sides behind, constricted near the tip, apical margin not elevated, 

 postocular lobes obsolete ; disc very coarsely punctured, dorsal channel 

 distinct, lateral tubercles obsolete. Elytra ventricose, gradually wider 

 than the prothorax, obliquely narrowed behind the middle and strongly 

 declivous, striae very deep, punctured, interspaces not wider, convex ; an 

 elongate basal spot on the sutui'e of white scales ; space between the two 

 bauds of fine gray pubescence, darker. Beneath coarsely punctured, finely 

 and sparsely pubescent. Legs and antennae lighter brown. Length 2.5 

 mm. ; .10 inch. 



Middle and Western States, two specimens. 



Group in. I'eutorbyncbi. 



The species of this group are small, and of the broad ovate form usual 

 in the tribe. They differ from the preceding group by the pectoral groove 

 not extending behind the front coxae, and from the next group by the beak 

 being long, slender, and curved ; usually about half the length of the 

 body. The eyes are small, not prominent, and are partially concealed in 

 repose bj^ broad prothoracic lobes. The prosternum is suddenly and very 

 deeply emarginate in front, and the antecoxal ridges defining the pectoral 

 groove are acute and elevated in all our species. 



The beak is stouter and more coarsely sculptured in (^, and the last ven- 

 tral segment is impressed.* The species in our fauna are not very numer- 

 ous, and all belong to CeutorhyncTitis ; some European species with G- 

 jointed funicle have been separated under the name Ceutorhynchidius, 

 but I see nothing in our species sufficient to warrant the adoption of such 

 a division. 



* By an unfortunate error, Suffrlan (Ent. Zeitung, 1845, 102) has stated that 

 the females have the ventral Impression. Tnonipson, however, (Skand. Col. 

 vii, passim), reports the se.Kual difference correctly. 



