110 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



and fifth taken together, the fourth slightly longer than the- fifth, 

 the latter, with sixth and seventh siibequal in length, eighth slightly 

 shorter and feebly triangular, ninth and tenth irregular^ orbicular, 

 eleventh oval to subtrapezoidal and scarcely longer than wide, 



Pronotum widest at the middle and more than twice as wide as 

 the head, and about one-half wider than long; disc smooth, moder- 

 ately and evenly convex, frequently with small, irregularly placed 

 impressions, rather finely and more or less sparsely punctate, with 

 rather broad impressions within the basal angles; apex moderately 

 and evenly emarginate, usually distinctly margined, bead mod- 

 erate; sides evenly, broadly, and rather strongly arcuate in anterior 

 five-sixths, thence to base oblique or more or less sinuate, distinctly 

 and rather coarsely beaded ; hase feebly emarginate to truncate and 

 rather coarsely margined ; apical angles distinct, not acute nor 

 rounded ; basal angles rectangular or feebly obtuse. 



Proplcnra> rather finely, thickly, and submuricately punctate and 

 rugulose. 



Elytra oval, glabrous, not pubescent, usually narrowing at or some- 

 times broadest at the base, the latter truncate and more or less sinuate 

 laterally, slightl}^ wider than the contiguous prothoracic base; hu- 

 meral angles subrectangular, extending under the basal angles of 

 the prothorax; sides more or less moderately and evenly arcuate,, 

 apex obtuse and not produced ; disc depressed on the dorsum, slightly 

 convex, sides rather narrowly rounded and inflexed, sometimes 

 slightly carinate at humeri, rather evenly and arcuately declivous 

 posteriorly; surface feebly sulcato-striate, intervals more or less 

 moderately cfmvex, stria? submuricately punctate, punctures irregu- 

 larl}^ and more or less densely placed ; intervals smooth, irregularly 

 and more or less sparsely punctate: inflexed sides inwardly oblique 

 and feebly convex to plane, not in the least striate, irregularly, 

 rather evenly, finely submuricately punctate and rugulose. Occa- 

 sionally the punctures at the sides near the apex become strongly 

 muricate or subspiculate. 



Epifleurw slightly wider than in trirostata and gradually dimin- 

 ishing in width to apex, the superior margin beneath the humeri quite 

 broadly sinuate; surface irregularly and rather finely submuricately 

 punctate. 



Sterna more or less glabrous and somewhat obsoletely or finely punc- 

 tate and rugulose. 



Parapleura' finely, subasperately and rather densely })unctate. 



Abdomen more or less glabrous, finely, rather sparsely and more 

 or less obsoletely punctulate and rugulose. 



Ze^A' moderate, femora mutic; anterior tibial spurs dissimilar in the 

 sexes, the anterior larger and longer than the postei-ior: tarsi very 



