380 BULLETIN G3, UNITED STATES NATIONAL MUSEUM. 



constriction, which is usually at basal sixth, thence straight and 

 parallel to the basal angles; the fine margin is very feebly reflexed 

 and obsolete on the constriction; base truncate in circular arc, finely 

 or obsoletely margined, about equal to the length and slightly to a 

 fourth wider than the apex ; apical angles obtuse, not in the least 

 prominent anteriorly and more or less rounded; basal angles rec- 

 tangidar and not i)rominent. 



Pi'opleurw more or less sparsely granulate and rugulose. 



Elytra rather broadly oval, about a fourth longer than wide, widest 

 at the middle; base truncate and wider than the contiguous pro- 

 thoracic base ; humeri rounded, scarcely at all angulate ; sides eveidy 

 arcuate, apex obtuse and moderately rounded ; disc moderately convex 

 on the dorsum, rather strongly and evenly rounded laterally, strongly 

 and arcuately declivous posteriorly, generally quite a ertically so ; 

 surface densely, irregularly, and rugosely muricato-tuberculate, less 

 strongly sculptured along the suture ; punctures minutely setigerous, 



Ejnpleurw moderate in width, slightly dilated beneath the humeri, 

 superior margin feebly and very broadly sinuate in basal fourth and 

 scarcely visible at humeri when viewed from above ; surface smooth, 

 sparsely and rather coarsely punctate. 



Stenui more or less densely punctato-rugose, punctures setigerous, 

 noticeabh" so on the mesosternum ; seta> short, black; and rather stiff. 



Parapleural densely punctate. 



Ahdomen smooth, sparsely and distinctly punctate; first seguient 

 punctato-rugose, the fifth rather densely punctured. 



Legs moderate in length and thickness and quite strongly sculp- 

 tured, the punctures bearing short black setae. Anterior femora 

 mutic in the sexes. Anterior tibial spurs quite siuiilar, the anterior 

 slightly longer than the posterior. Anterior and middle tarsi dis- 

 similar in the sexes. 



Male. — Moderately robust, somewhat narrow, antennre reaching to 

 or just beyond the base of the prothorax. Elytra about a fourth 

 longer than wide. Abdomen moderately convex, slightly oblicpie, 

 lu'oadly impressed at middle of the first segment. Spurs of the pro- 

 tibia' (piite slender and acute. First two joints of the protarsi clotlKKl 

 with flattened tufts of golden pubescence beneath ; first joint of the 

 middle tarsi with a well-developed and similar tuft at apical third 

 beneath; pubescent joints not noticeal)ly thickened at tip. 



Fonale. — Robust. Antennie about reaching to the prothoracic base. 

 Elytra broadly oval and about a fifth longer than wide. Abdomen 

 quite strongly convex. S})urs of the ]5r()tibia^ slightly thickened and 

 acute. First joint of the })r()tarsi slightly thickened at ai)ex l)eneath, 

 groove more or less distinct. 



Measurements. — Males: I^ength, Di-in.ti nun.; width, G-O.b mm. 

 Females: Length, 12-17 nun.; width. 0.8-1) mm. 



