214 CURCULIONTDJE. 



[LeConte. 



the suture; scutelluni white; striae composed of quadrate punctures, inter- 

 spaces flat, densely rugose. Antennae and legs dark reddish brown. Length 

 4 mm.; .15 inch. 



Middle, Southern and Western States; Mr. C. V. Riley has given me a 

 specimen, with the following note of habits : " On elm; makes a similar 

 noise to the Plum Curculio, August 5th, 1874." Behind the white band the 

 suture is velvety black, contrasting well with the diffused brown tint into 

 which the band fades towards the tip of the elytra. 



This curious insect is suggestive of a very small Pissodes, with which, 

 however, it has no relations beyond the mere superficial resemblance in 

 form and sculpture. 



THYSANOCNBMIS n. g. 



A singular genus somewhat resembling Anthonomus in appearance, but 

 known at once by the front tibiae of the ^ being broader than usual, sinuate, 

 and densely fringed on the inner side with long hair. 



Beak longer than the prothorax, slender, moderately curved, cylindrical ; 

 eyes rather large, front narrow; antennae inserted about one- fourth from the 

 end of the beak, scape slender, reaching the eyes; funicle 7-jointed, first 

 joint long and thicker, second a little longer than third; 3-7 nearly equal, 

 scarcely increasing in width; club rather large, elongate-oval, very dis- 

 tinctly annulated. Prothorax wider than long, narrowed in front, and 

 feebly constricted, broadly rounded on the sides. Elytra nearly one half 

 wider than the prothorax at base, oblong, slightly narrower from the hu- 

 meri, which are prominent and rounded. Ventral segments unequal; first 

 and second equal; third and fourth equal, but together a little longer than 

 the second; fifth longer than third and fourth united; first suture straight, 

 the others angulated at the sides; fourth suture nearly obliterated at the 

 middle; pygidium partly exposed, perpendicular. Legs stout, thighs not 

 toothed, tibiae of $ thick, sinuate on the inner side, armed with a small ter- 

 minal hook; front pair also with a long dense fringe of yellow hair on the 

 inner margin; tibiae of 9 more slender, claws with a long tooth, which 

 curves inwards, as in most species of Anthonomus. 



1. T. fraxini n. sp. 



Ferruginous, clothed with yellow hair. Beak finely punctured, obsoletely 

 striate. Prothorax densely punctured. Elytra with punctured striae, and 

 slightly convex, nearly smooth interspaces ; with a broad transverse band 

 occupying the middle third, and dilated at the margin, less densely pubes- 

 cent, and of a darker color. Length 3.7 mm.; .15 inch. 



One male given me by Dr. Melsheimer, as found in York County, Penn- 

 sylvania; several females collected by Mr. Pettit on ash trees in Canada. 



2. T. helvolus n. sp. 



Brown, clothed with short sericeous yellowish brown hair; beak long, 

 slender, much curved, nearly smooth ; head opaque, punctured, front pubes- 

 cent, not wider than the beak; eyes rather large. Prothorax twice as wide 

 as long, much rounded on the sides, strongly punctured, sub-carinate. 



