64 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



from above, or more strongly arcuate at the middle, thence oblique 

 and moderately convergent, feebly sinuate to base as viewed obliquely 

 from the side, finely beaded: base quite evenly and feebly rounded, 

 finely to somewhat obsoletely margined and about one-fifth wider 

 than the apex: apical angles distinct, not acute, frequently narrowly 

 rounded ; basal angles obtuse, sometimes more or less rounded. 



Pro pie urn- finely, sparsely to rather densely submuricately punctate 

 and more or less rugulose. 



Elytra oval, usually widest at about the middle, less than twice as 

 long as wide; base broadly and feebly emargiiiate, as wide as or 

 slightly wider than the contiguous prothoracic base; humeri more or 

 less feebly prominent : sides evenly arcuate, apex not very narrowly 

 rounded; disc quite evenly convex, occasionally slightly flattened on 

 the dorsum, laterally rather evenly and strongly rounded, arcuately 

 declivous posteriorly, deeply sulcate, the sulci finely, uniseriately to 

 irregularly and muricately punctate; intervals about eqiuil in width 

 to the sulci, very convex, usually strongly defined, finely, sparsely, 

 and irregularly punctate: inflexed sides feebly sulcate, intervals 

 feebly convex, irregularly and rather more densely punctate. 



Epipleinxe moderate in width and gradually narrowing from base 

 to apex, sujjerior margin feebly and broadly sinuate beneath the 

 humeri : surface finely, more or less sparsely, submuricately punctate. 



Sterna more or less finely, densely, submuricately punctate and 

 rugulose. 



Parapleural finely and rather densely punctate. 



Abdomen somewhat shining, sparsely to more or less densely punc-" 

 tate, especially on the first and last segments, more or less rugulose. 



Legs moderate, comparatively rather longer than in obsolete. 

 Anterior femora mutic in the sexes. Anterior tibial spurs dissimilar. 

 Anterior tarsi dissimilar in the sexes, first joint slightly thickened at 

 tip beneath, with a small tuft of spinules. 



Male. — Body somewhat slender. Elytra rather gradually nar- 

 rowed posteriorly, evenly arcuately and somewhat obliquely declivous 

 at apex. Abdomen slightly oblique, moderately convex and more or 

 less broadly flattened at middle on first two segments, intercoxal 

 process more or less concave. Anterior spurs of the anterior tibia^ 

 about a half longer than the posterior, distinctly wider and gradually 

 narrowing from base to apex. Anterior tarsi longer than in the 

 female, first joint with a minute and inconspicuous tuft of modified 

 spinules, surrounded by ordinary spinules on the thickened tip 

 beneath. 



Female. — Body robust. Elytra rather broadly oval, rather rapidl}^ 

 narrowed, arcuately and vertically declivous posteriorly. Abdomen 

 horizontal and strongly convex. Anterior spurs of the anterior 

 tibia? about a third longer than the posterior, distinctly broadened. 



