344 BULLETIN 63, UNITED STATES NATIONAL MUSEUM. 



humeri, Avhere it is at times someAvhat visible from above; surface 

 smooth, opaque, sparsely and quite obsoletely punctate. 



Sterna irregularly and densely punctato-rugulose. 



Paraplenra' rather coarsel}^ but not densely punctate. 



Ahdomen more or less glabrous, variable in dullness, rather sparsely 

 and somewhat finely punctate, more coarsely, densely, and rugulosely 

 sculptured about the coxa\ last tAvo segments more finely so. 



Legs moderate in length and stoutness; anterior femora mutic and 

 more or less sinuate in outer fifth ; tibial spurs similar in the sexes and 

 rather small, the anterior slightly longer 4:han the posterior; tarsi 

 dissimilar, in the sexes, 



Male. — Moderately narrow. Antennae reaching a little beyond the 

 base of the i)rothorax. Elytra a little narrowed posteriorly, arcuately 

 and rather obliquely declivous apically. Abdomen slightly oblique 

 and moderately convex, impressed on the first two segments at mid- 

 dle. First two joints of the protarsi slightly thickened at tip beneath 

 with pubescent tufts upon the same; the tufts are truncate, that of 

 the first moderate in size and about twice as large as that of the 

 second. First joint of the middle tarsi with a very small tuft at tip; 

 all the tufts golden yellow. 



Female. — Robust. Antennoe just slightly reaching beyond the base 

 of the prothorax. Elytra arcuately but scarcely verticall}^ declivous 

 posteriorly. Abdomen horizontal and rather strongly convex. An- 

 terior and middle tarsi simple beneath, grooves distinct. 



Measurements. — M(tlcs: Length, 13-16 mm.: width G-7 mm. Fe- 

 males: Length 14.5-17 mm.; width 7-8.2 mm. 



Genital characters., male. — Edeagophore somewhat flattened ob- 

 long-ovate, moderately elongate and slightly arched. 



Basale oblong, sides feebly arcuate, surface moderately convex. 



Apicale triangular, rather strongly convex and without a groove; 

 sides rather strongly sinuate so that the apex appears produced, the 

 latter acute; base with a small rounded median lobe and feebly sin- 

 uate laterally. 



Stemite small, slightly transversely oblong. Each lobe small and 

 subtriangular; surface almost impunctate in basal third, thence to 

 apex sparsely to densely punctate at apical margin, setose, sets' 

 small, increasing in length to apex Avhere they are moderately long; 

 sides sinuate and somewhat ()l)]iqu(> in basal two-thirds, thence to apex 

 truncately subarciiate; apex introrse and subacute; internal margin 

 straight or feebly sinuate. Membrane not setose, sinus triangulo- 

 oblong. 



Female. — Genital segment tra]:)ezo-triangular, dorsal surface very 

 slightly ogival, very feebly setose and moderately depressed. 



Valrala.—T)oY'&di\ plate slightly oblique, being externally declivous, 

 elongately oblong, sides subpiuallel and moderately explanate exter- 



