CURCULIONIDAE. 413 



1. Thighs not toothed, prosternum emarginate in fioiit. 2. 

 Thighs toothed, prosternum not emarginate. Dorytomus. 



2. Body pubescent or glabrous. 3. 

 Body densely clothed with scales. Grypidius. 



3. Antennae inserted far from the tip of the rostrum. Erycus. 

 Antenuse inserted near the tip of the rostrum, grooves not coullueiit 



behind. 4. 



4. Beak elongate, arcuate. Procas. 

 Beak stout, and nearly straight. Acrisius. 



Procas and Acrisius are confined to the Atlantic slope in the 

 northern portion. .The other genera extend across the continent. 



Group II. — Desmorhines. 



In the genera constituting this group the beak is slender, and 

 separated from the head by a sharply defined transverse line or 

 constriction. In our genera the claws are connate at base, but as 

 this character is not mentioned in the European genus Sharpia 

 (Tournier, Ann. Ent. Bclg. xvii. 84), and is somewhat variable 

 in Smicronyx, we do not know that it is properly of group value. 

 The mandibles are truncate at tip, and toothed both on the inner 

 and outer edge as in RhynchitidiB. The prosternum is emargi- 

 nate in front, and the ventral sutures are very slightly curved 

 at the sides. The autennal grooves descend obliquely and are 

 almost confluent behind. 



Antennae with first and second joints of funicle elongated. 2. 



Antennae with second joint of funicle scarcely longer than third. 3. 



2. Antennae slender, club small, oval. Desmoris. 

 Antennae stouter, club larger, elongate oval. Barytychius. 



3. Claws small, frequently connate nearly to the tip. Smicronyx. 



By an error of determination Pachytychius was used in our 

 work on Rhychophora instead of Barytychius. The former 

 genus is unknown in our fauna, and has a distinct scutel. 



Desn)oris is found in Kansas ; Barytychius and Smicronyx on 

 both sides of the continent. 



Group III. — Eugnomini. 



Following the example of Lacordaire, we recognize as a dis- 

 tinct group a small number of genera which are closely related 



belongs to Elleschus. Erirhimis jnntperinus Sanborn, is an Anthonomus. 

 Erirhinus lutulentus and rntilus Boh., Sch. Cure. vii. 2d, 165 and 167 liave 

 not been identified. 



