352 BULLETIN 6:}, UNITED STATES NATIONAL MUSEUM. 



Male. — Somewhat narrow, antennse reaching beyond the base of 

 the prothorax. Elytra slightly wider than the prothorax. evenly 

 arcuately declivous posteriorly, abdomen distinctly oblique, moder- 

 ately convex, feebly and broadly flattened on first tAvo segments. 

 Anterior tarsi Avith the first joint slightly thickened at tip beneath. 

 (In the type the tarsi are entirely denuded of spinules, but the first 

 two joints in all probability have pubescent tufts on the tips beneath, 

 the first larger than the second; the first joint of the middle tarsi 

 although not noticeably thickened at tip, undoubtedly bears a small 

 tuft of golden hairs.) Such is the case in the Calaveras specimens, 

 and besides the third joint of the protarsi and the second of the meso- 

 tarsi have smaller tufts at tij)s. 



Female. — Moderately robust, antennae attaining the prothoracic 

 base. Elytra rather broadly oval and distinctly wider than the pro- 

 thorax, arcuately and vertically declivous posteriorh\ Abdomen 

 horizontal and rather strongly convex. Anterior tarsi with the first 

 joint slightly thickened at tip beneath, grooves entire. 



Measurements. — Male: Length, 13 mm.; Aviclth, 5.5 mm. Female: 

 Length, 18.5 mm. ; Avidth, C.5 mm. 



Genital vhavacters^ male. — Edeagophore oblong-oA'ate, somewhat 

 flattened and quite strongly arched. 



Basale oblong, about twice as long as Avide, rather strongly conA^ex ; 

 sides moderately arcuate. 



ApicaJe triangular, moderately convex above, Avithout grooA^e ; sides 

 moderately sinuate, apex subacute and apparently produced; base 

 Avith a moderate, rounded median lobe and sinuate laterally. 



Sternite rather short and transA^erse, triangulo-parabolic in out- 

 line. Each lobe subtriangular; surface feebly couA^ex, glabrous, 

 rather finely and quite densely punctate toAvard apex, setose, setae 

 moderate and rather fine, not very long; external border oblique and 

 feebly sinuate in basal half, thence obliquely truncate to apex, or 

 feebly arcuate so as to appear subangulate at middle; apex subacute 

 and distinct; internal margin straight or feebly sinuate and oblique. 

 Membrane not setose across the bottom of the sinus, the latter tri- 

 angular. 



Female. — Genital segment (Plate 5, fig. 15) obtusely triangular, 

 moderately depressed, dorsal surface of each valve more or less 

 slightly declivous externally, apex setose. 



Valvula. — Dorsal plate oblong, glabrous, almost impunctate; sur- 

 face more or less distinctly concave; external border slightly arcuate, 

 the internal more or less sinuate; apical margin more or less evenly 

 rounded. Apex short and rather thick, finely setose, setse at tip 

 rather long. Fossa at the middle of the external surface of the apex, 

 the setse rather long around its margin. £ 



