226 BULLETIN 63^ UNITED STATES NATIONAL MUSEUM. 



Propleurce smooth and opaque, rngiilose, with few scattered 

 granules, especially upon the acetabular convexities. 



Elytra oval, shining, and more or less sulcate, less than twice as 

 long as wide — apical prolongation not included — widest at middle 

 and truncate at base, where they are slightly wider than the contigu- 

 ous prothoracic base ; humeri obtuse and more or less rounded ; 

 sides evenly arcuate, apex horizontally produced ; disc moderately 

 convex, slightly flattened and arcuately rounded laterally, obliquely 

 declivous posteriorly passing into the cauda; surface striate, striae 

 more or less impressed and strongly punctate, the punctures muricate 

 and closely placed, intervals more or less convex but not strongly so, 

 uniseriately punctate, the punctures distantly placed and muricate, 

 those of the outer intervals more or less confused and at times rather 

 densely and muricately subrugoso-punctate ; inflexed sides obsoletely 

 striate and quite densely and irregularly muricatelj?^ punctate and 

 at times slighth' concave at base of apex. 



Cauda moderately long, granulo-muricate, above with the suture 

 impressed, tip emarginate; beneath concave, sparsely muricato- 

 granulate, the surface of each lateral half being a dilatation of the 

 apical epipleural surface of the corresponding side; in the median 

 line the two inferior epipleural margins are contiguous. 



Epiqjlenrw rather narrow and gradually narrowing from base to 

 apex, wdiere they dilate to become the inferior surface of the cauda ; 

 surface opaque, smooth, and sparsely muricately punctulate, except 

 at base. 



Sterna more or less irregularly, submuricately punctate and 

 rugulose. 



Parafleurm more or less irregularly punctate. 



Abdomen horizontal, rather finely, sparsely, and evenly submuri- 

 cately punctate. 



Lecjs moderately long and more or less slender. Femora rather 

 thickly clothed with moderately long appressed seta?, with an occa- 

 sional long flying hair on the external surface. Tibiae densely muri- 

 cate and rather sparsely set with long flying hairs; anterior spurs 

 quite equal in length and size and more or less backwardly curved. 

 Tarsi similar in the sexes and clothed with rather long hair-like 

 setse, those on the last joint of each tarsus projecting noticeably be- 

 yond the ungues. 



Mule. — Somewhat narrow. Antennae reaching slightly beyond the 

 prothoracic base. Elytra rather gradually and obliquely declivous 

 posteriorly, becoming sinuate in passing into the horizontal cauda; 

 the latter may be equal to about one-sixth of the entire elytral length. 

 Abdomen feebly ventricose'to the fourth segment. Anterior femora 

 with a broad and very obtuse tooth or mutic. 



