422 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Legs moderate in length and variable in stoutness. Femora rather 

 sparseh" punctate, the anterior mutic in the sexes; anterior tibial 

 spurs almost equal. Tarsi slightly dissimilar in the sexes. 



Male. — Rather narrow, not distinctly ovate, more fusiform. Elytra 

 quite evenly arcuately declivous and somewhat gradually narrowed 

 posteriorly. Abdomen feebly oblique, moderately convex, and more 

 or less broadljT^ and feebly impressed at middle' of firi?t two segments. 

 Legs somewhat slender, especially the tibia^. Anterior tarsi with a 

 small transverse tuft of modified spinules at tip of first joint beneath, 

 the tuft closing the plantar groove. 



Female. — Rather robust. Elytra widest behind the middle, arcu- 

 ately and somewhat obliquely declivous and somewhat rapidly 

 narrowing posteriorly. Abdomen horizontal, rather strongly and 

 evenly convex. Legs rather stout, the tibia^ moderatelv so. First 

 joint of the protarsi not modified at tip beneath, plantar groove wide. 



Measurements. — Male: Length, 20 mm.; width, 7.2 mm. Females: 

 Length, 22.5-2G mm ; width, 9-10 nun. 



Genital characters.^ male. — Edeagophore as in gigantea. Stcrnife 

 rather short and transversely parabolic in outline. Each lobe rather 

 small and subtriangular; external border subangulate at middle, 

 thence to base feebly arcuate, to apex obliquely truncate, apex nar- 

 rowly rounded ; inner l)order feebly arcuate ; surface densely and 

 strongly punctate in apical moiety, each puncture with a long black 

 seta. Membrane not setose, sinus broadly oval. 



Female. — Genital segment subparabolic in outline, feebly elongate 

 and finely setose. Superior pudendal membrane broadly exposed, 

 and the dorsal plates widely separated. 



Valvula. — Dorsal plate subfalcate, with surface more or less con- 

 cave, facing upwards and outwards, coarsely punctate, each ])uncture 

 with a short, rather stout semirecuuibent seta ; borders gradually 

 converging to the apical border, which is more or less rounded ; inter- 

 nal border quite sharp and broadly sinuate; internal surface of the 

 valve much exposed and inwardly declivous, densely and rather 

 strongly punctate in apical third beneath the apex, each puncture 

 with a short, curved, and semirecuuibent seta. Apex chitinous, semi- 

 oval in outline, flattened, projecting upward and backward, mod- 

 erately divergent, tip broadly rounded; surface feebly convex and 

 more or less punctate. 



Appejulage minute, scarcely projecting beyond the fossa, which is 

 situated in an excavation between the external surface of apical base 

 and the apical mar-gin of the dorsal plate; short, semioval in form, 

 with a few short seta? at tip. 



Basal prominences not noticeable. 



Ventrolateral surfaces as in gigantea. 



