208 SUBFAMILY X. CURCULIOXIX.K. 



developing during the winter. The fact that this lesser chestnut 

 weevil was not the true rccttis of Say was first set forth by Casey. 

 He has given (1010. 118) descriptions of four forms, each of 

 which seems applicable to the weevil in question. We have there- 

 fore adopted the first one given as the specific name. The other 

 three proposed by him are as follows: 



B. setosicornis. fifth ventral of male flattened medially, subglabrous 

 posteriorly, a dense tuft of hairs each side of apex, the two patches nearly 

 contiguous medially. Length 6.2 6.5 mm. West Virginia 



B. macilentus, fifth ventral of male more scantily clothed; form nar- 

 rower, vestiture looser. Length 6 6.5 mm. West Virginia. 



B. perexilis, fifth ventral of male pubescent at tip; "fifth ventral 

 female (?) with deep rounded concavity in about apical half;" very small 

 and slender, by far the slightest in form. Length 4.5 4.8 mm. New Jersey. 



These names do not seem to indicate more than individual 

 variations, here introduced to indicate the tendency to variation 

 in secondary sexual characters. The deep rounded concavity of 

 fifth ventral described by Casey in itcic.rilis female is present in 

 a male of dhjcnnjiiiniift, length f>..~) mm., from Crawford County, 

 Indiana; it seems merely an exaggeration of the usual male char- 

 acter in this species, and leads to a doubt of the sex of Casey's 

 specimen. 



GROUP B. 



Our six species of this group are separated as follows; the 

 first and the last being the more strongly differentiated species. 



KEY TO EASTERN SPECIES OF GROUP C. 



a. Outer edge of femoral tooth forming a right angle with femur; beak 



of male distinctly shorter than that of female. 



b. Beak of female nearly or quite as long as body; femoral tooth 

 strong; pubescence mottled; fifth ventral of male concave with 

 tuft of hair each side; length 5 7.5 mm.; on oak, preferably an- 

 nual-fruited species. 387. XASICUS. 

 1)1). Beak in bcth sexes shorter than body. 



c. Hairs of pygidium of male produced into a closed tube; pubescence 

 spotted; occurs on oak. 388. PARDALIS. 



cc. Pygidium of male with a simple tuft of hairs. 



d. Femoral tooth stronger; beak of male scarcely half the length 



of body. 



e. Femora stout and more strongly inflated; scape of antennae as 

 long as three basal funicular joints united; thorax more 

 curved at sides and more distinctly narrowed at base than 

 in nasicus, with the sublateral stripe of pale scales more evi- 

 dent; elytral vestiture variegated with a transverse pale 

 band near apical third; occurs on Qitercus ncuia. 



389. CONFUSOR. 



