180 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



Head slightly more than twice as wide as lono;, moderately convex, 

 more or less impressed laterally and along- the frontal suture, sparsely 

 punctulate and pubescent. Antenna- rather short, outer four joints 

 feebly compressed and very slightly dilated, third joint scarcely as 

 long as the next two taken together, fourth to the seventh inclusive 

 subequal, eighth slightly shorter and subtriangular, ninth suborbicu- 

 lar, tenth very feebly transversely oval, eleventh rather broadly oval. 



Pronotum nearly twice as wide at base as long, and about one- 

 seventh longer than width at apex; di8c feebly convex, sparsely 

 punctulate and pubescent ; aqiex rather deeply and semi-circularly 

 emarginate, obsoletely margined; sides regularly arcuate and grad- 

 ually convergent from base to apex, verv finely beaded; hase squarely 

 truncate, very finely margined and slightly over-lapping the elytral 

 base; apical angles slightly prominent anteriorly and subacute; 

 basal angles subrectangular and rather narrowly rounded. 



Propleurw very finely, sparsely punctulate, pubescent, and rugu- 

 lose; broadly and moderately excavated beneath and internally to 

 the basal angles. 



Elytra triangularly shield-shaped, squarely truncate at base and 

 slightly wider than the contiguous prothoracic base; humeri nar- 

 rowly rounded; sides evenly arcuate and gradually converging to 

 apex, and from the base regularly continuing the curve of the sides 

 of the pronotum ; ape.r obtuse and not produced ; disc feebly convex, 

 quite suddenly deflexed at the sides with margin narroAvly rounded, 

 but acute in basal third, evenly and strongly arcuately declivous pos- 

 teriorly; finely, eveidy. and not densely punctulate and pubescent, 

 the pubescence arranged so that the surface appears substriate; in- 

 flexed sides plane. 



Epipleurcf rather narrow and feebly dilated at base beneath the 

 humeri, very gradually narrowing from base to apex; surface finely 

 punctate and sparsely pubescent. 



Sterna rather densely punctate and feebly shining; prosternum 

 obsoletely punctate anteriorly. 



Parapleune very finely and sparsely punctate. 



Ahdomen distinctly horizontal in the sexes, glabrous and shining, 

 quite coarsely and densely jiunctate on tlie first segment, the puuc- 

 tures becoming finer and less dense on the succeeding segments, rather 

 strongly and evenly convex from side to side. 



Legs rather small and slender; femora mutic, and finely, sparsely 

 pimctate; tibia' straight; anterior tibial s])urs slightly unecjual in 

 length and stoutness, the internal spurs of the lueso- and metatibia' 

 a little longer than the external; tarsi feebly dissimilar in the sexes. 



Male. — ^Feebly elongate oval. Antennie reaching to about the 

 posterior fifth of the pronotum; elytra widest at the base, sides 



