268 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Abdomen horizontal, rallior finely and sparsely punctate, denser on 

 the fifth segment. 



Legs moderate, sometimes quite robust : all of the femora armed 

 with an acute triangular tooth in both sexes, and coarsely, densely 

 punctate; all of the tibia^ more or less arcuate in basal half; tibial 

 spurs acute and subequal on their respective tibise; tarsi similar iri 

 the sexes. 



Male. — Antennae reaching to the posterior fifth of the prothorax. 

 the latter with base one-half wider than the apex and a fourth 

 greater than the length, a third wider than long. Abdomen moder- 

 ately convex, broadly and not strongly impressed. Femora robust, 

 very coarsely and rather strongly punctate, punctures often deeply 

 impressed. Sometimes the femoral teeth are very strong. 



Female. — Antennae scarcely reaching to the posterior fifth of the 

 prothorax, the latter with the base about equal to the length, about 

 a fifth wider than long, and a fourth wider than the apex. Abdo- 

 men evenly and strongly convex. 



Measurements. — Male: Ijcngth, 22.5-28 mm.; width, 7.5-9.5 mm. 

 Female: Length, 22-25 mm.; width, 7.5-8.5 mm. 



Genital eharacte?\s, male. — Edeagophore of the usual flattened 

 oblong-ovate form, and somewhat oblong. 



Basale with the sides scarcely parallel, about two and a half times 

 longer than Avide, slightly or not arched, very strongly and quite ab- 

 ruptly convex from side to side, with rather a strong antero-posterior 

 conA^exity, the disc appearing gibbous at middle. 



Apieale triangular, slightly elongate and decurved apically ; sur- 

 face evenly and moderately convex, and with a linear groove in apical 

 half, that does not extend upon the apex ; sides arcuate at base, 

 feebly sinuate towards apex, the latter slightly })roduced and nar- 

 rowly rounded at tip; base broadly lobed at middle, scarcely sinuate 

 laterally. 



Stern !te moderately transA^erse. Each lobe subtriangular ; exter- 

 nal border nearly eA^enh' arcuate; internal margin nearly straight, 

 Avith apex rounded; surface strongly punctate in apical half, setose, 

 setic not dense, and moderate in length. Sinus rather broad, mem- 

 brane not setose across the bottom of the same. 



Feirvale. — Genital segment trapezo-triangular, moderate in size 

 and rather strongly setose. 



Valvida (Plate 1, fig. 20). — Dorsal i)late oblong, concave, sides 

 evenly reflexed ; surface finely, eA^enly, and not very densely punctate 

 throughout, seta* short and reclinate; external border quite straight; 

 internal border more or less sinuous; apical margin more or less arcu- 

 ate, angle obtuse. Dorsal margin of the fossa conspicuously fringed 

 Avith rather long seta% those at the angle a little longer and denser. 

 Apex moderate and triangiilar, tip acute Avith fcAV short hairs. 



