214 BULLETIN 63. UNITED STATES NATIONAL MUSEUM. 



gins in anterior half, scarcely opaque, rather finely and more or less 

 evenly and sparsely punctate; a'pex feebly emarginate or siibtruncate, 

 generally finely margined laterally and obsoletely so at middle ; sides 

 evenly and moderately arcuate anteriorly, less so or rather straight 

 and convergent from middle to the base, sometimes feebly sinuate 

 in front of the basal angles, marginal bead fine ; hase feebly arcuate, 

 finely beaded, and equal to the apex; apical angles acute, prominent 

 anteriorly and frequently everted; basal angles subrectangular or 

 slightly obtuse. 



Propleuroe smooth, obsoletely punctulate and rugulose, or impunc- 

 tate. 



Elytra elongate oval, feebly shining to slightly opaque, about twice 

 as long as wide, usually widest at the middle; hase very feebly emargi- 

 nate and equal to or slightly wider than the contiguous prothoracic 

 base; humeri obtuse, sometimes slightly prominent; xides evenly arcu- 

 ate, sometimes narrowing towards base, apex more or less obtuse, 

 never produced; disc more or less evenly convex from side to side, 

 or somewhat flattened, more or less rapidly and arcuately or obliquely 

 declivous posteriorly; surface feebly substriate, the striae with rather 

 coarse, closely placed, and more or less impressed punctures, the inter- 

 vals flat or at times slightly convex and with a more or less uneven 

 series of submuricate punctures; sometimes the punctures are in- 

 dented, both series becoming more strongly muricate at the sides and 

 apex. 



Epipleurae moderately narrow, with a broad and gentle upward 

 curve at base, thence narrowing gradually to apex; surface smooth 

 and obsoletely j^unctulate. 



Sterna usually more or less feebly punctate and rugulose. 



Paiuiplevra' more or less strongly punctate. 



Ahdotneii horizontal, usually smooth and obsoletely punctulate, 

 fifth segment rather more strongly punctate. 



Legs moderate in length and rather slender, profemora more or 

 less armed in the sexes; protibial spurs quite equal and acute; tarsi 

 similar in the sexes. 



Male. — Somewhat narrow. Antenna^ with about three joints 

 reaching beyond the prothoracic base. Elytra rather rapidly, arcu- 

 ately, and obliquely declivous posteriorly, apex moderately acute. 

 Abdomen moderately convex. Profemora with an acute or obtuse 

 tooth at outer fourth. 



Female. — Somewhat robust. Antenna^ with about one joint ex- 

 tending beyond the prothoracic base. Elytra arcuately and nearly 

 vertically declivous posteriorly; apex more or less obtuse. Abdomen 

 strongly convex. Profemora mutic or with a very obtuse tooth at 

 about the outer fourth. 



