238 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



marginal head fine; hase more or less arcuate and finely margined, 

 slightly wider than the apex and equal to the length; apical angles 

 acutely dentate or acuminate and more or less everted; basal angles 

 obtuse, not rounded nor prominent. 



Profleurm more or less convex, obsoletely punctulate and more or 

 less rugulose. 



Elytra oval, rather elongate, widest at the middle, smooth, more or 

 less shining and not in the least muricate; hase feebly emarginate and 

 scarcely wider than the contiguous prothoracic base; hvmeri obtuse 

 not rounded nor prominent ; sides evenly arcuate, apex subacute and 

 not produced ; disc rather feebly convex on the dorsum, strongly and 

 evenly so laterally, more or less gradually arcuately declivous poste- 

 riorly; surface striato-punctate, punctures fine and not impressed, 

 those of the striae sometimes larger, closel}'^ placed, the intervals flat, 

 with a series of more or less smaller and quite distantly placed punc- 

 tures ; the punctures become but slightly irregular at the sides and on 

 the apex. 



EjnpleurcB moderate in width beneath the humeri and gradually 

 narrowing to apex; surface smooth and obsoletely punctate. 



Sterna usually not strongly punctate and more or less irregularly 

 rugose. 



Parapleurm sparsely punctate. 



Abdomen horizontal, very sparsely, finely, and obsoletely punctu- 

 late, more or less finely and obsoletely rugulose; most distinctly 

 punctate on the fifth segment. 



Legs moderate in length, rather slender but variable. Anterior 

 femora armed in the sexes, with a moderate more or less acute tooth. 

 Anterior tibial spurs equal and acute in the sexes. Tarsi similar. 



Male. — Elongate and rather slender. Elytra rather gradually 

 narrowed and arcuately declivous posteriorly. Abdomen rather 

 moderately convex, somewhat flattened on the first two segments and 

 very feebly impressed at middle. 



Female. — Elongate and slightly robust. Elytra rather suddenly 

 and arcuately declivous posteriorly. Abdomen evenly and rather 

 strongly convex. 



Measurements. — Males: Length, 21-26 mm.; width, C.5-9 mm. 

 Females: Length, 20-27.5 mm.; width, 8-10.8 mm. 



Genital characters, male. — Edeagophore oblong-ovate, somewhat 

 flattened and not arched. 



Basale about twice as long as wide, evenly convex, sides evenly and 

 feebly arcuate. 



A'picale long triangular, evenly convex above, witli a moderate 

 median groove in apical third; sides evenly and slightly arcuate from 

 base to apex, the latter subacute ; base rather broadly lobed at middle 

 and feebly sinuate laterally. 



