162 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



sexes, and slightly larger and longer than the posterior. Tarsi dis- 

 similar in the sexes and rather robust. 



Male. — Body feebly robust and somewhat narrow. Antennae reach- 

 ing beyond the prothoracic base. Elytra not broadly oval, noticeably 

 attenuate, and rather obliquely declivous posteriorly ; apex not pro- 

 duced ; abdomen more or less oblique, moderately convex, and the 

 first segment is more or less broadly impressed at middle. Anterior 

 femora armed with a moderate and acute tooth at outer fifth. Ante- 

 rior tarsi with the first joint very feebly thickened, and clothed in 

 apical third beneath, with a tuft of silken pubescence; second joint 

 simple with groove entire. 



Female. — Robust. Antenna^ reaching slightly beyond the pro- 

 thoracic base. Elytra broadly oval, less attenuate, and arcuately 

 declivous posteriorly. Abdomen rather strongly convex, horizontal. 

 Anterior femora more or less distinctly sinuate in outer fifth; ante- 

 rior tarsi unmodified. 



Measurements. — y)/aZf-s,' Length, !21-i?4:.5 mm.; width, 8.2-9 mm. 

 Females: Length, 23-26 mm.; width, 10.5-12 mm. 



Genital characters.^ male. — Edeagophore elongate fusiform, scarcely 

 arched. 



Basale oblong-oval, sides subparallel, surface moderately convex. 



Apicale triangular, about one-half longer than wide; surface mod- 

 erately convex with a membranous groove in apical half: sides feebl}'' 

 arcuate or straight to the tij), the latter acute; base rather narrowdy 

 rounded at nnddle. l)roadly and feebly sinuate laterally. 



Stcrnite quadrato-parabolic. Each lobe rather long with the ex- 

 ternal border evenly arcuate, apical margin rather narrowly rounded, 

 angle not evident ; internal border arcuate; surface slightly convex, 

 rather densely and coarsely punctate, seta? long and quite dense. 

 Sinus broad, apical half not closed by membrane, the latter not setose. 



Female. — Genital segment subquadrate in outline. Valves expla- 

 nate externally, deflexed at apex and reflexed laterally and quite 

 densely setose. 



Valvula (Plate 5, fig. 3). — Dorsal plate ol)long-oval ; internal fifth 

 reflexed, glabrous and impunctate, externally upw\ardly oblique and 

 more or less deflexed peripherally; surface longitudinally channeled, 

 rather densely i)unctate and setose in outer four-fifths, seta' long and 

 flying; external border (juite arcuate; apical margin arcuate exter- 

 nally with the external margin, inwardly sinuate with the internal 

 apical lobe and set with seta?; inner margin broadly arcuate. Apex 

 triangular and rather short, finely setose. 



AiypcndiKje large and transversely semielliptical, rather thickly 

 set with quite long hairs. Fossa transverse, narrow, and closely 

 fitting the base of the aj^pendage. 



Basal prominences not evident. 



