190 CALIFORNIA ACADEMY OF SCIENCES. [34] 



wider than tbo bead and slightly wider thai long; sides rather strongly, 

 evenly rounded, moderately convergent to the base, very feebly sinuate near 

 the basal angles, which are obtuse, not rounded; base bro.idly, feebly, but 

 distinctly arcu tte, one-half wider than the apex; the latter transversely trun- 

 cate; disk strongly convex, excessively, minutely, spa' sely punctate, coarsely 

 so along the basal margin; lateral foveas rather sm ill, not very deeply im- 

 pressed, at less than one-third the length from the has?; median very small, 

 longitudinally, slightly elongate. Elytra at base distinctly wider than the 

 prothonx, at apex more than twice as wile as the latter; sides evenly, not 

 very strongly acuite; apex trunc ite, feebly sinuate laterally; disk very 

 slightly wider than loug, nearly three-fourths louger than the prothorax, 

 evenly, moderately convex, excessively minutely, obsoletely and sparsely 

 punctate; sutural strire deeply impressed, nearly straight; discal fine, dis- 

 tinct, slightly arcuate, teruiin itiug at one-tenth the length from the apex. 

 A'tdomen rather elongate, convex; first segment not as lmg a-! the next two 

 together; basal carinas distinctly divergent, separated by distinctly less than 

 one-third th ■ total width, one-half as long as the segment. Leg-, rather long 

 and slender; hind tibia? not strongly clavate. Length 1.4 mm. 



California; (Mendocino Co., 2). 



Describad from the male; the terminal dorsal segment is 

 more than four times as wide as long, very broadly, feebly 

 emarginate at apex. 



This species belongs near propinqua Lee, but is not very 

 closely related to any other described species. 



R. graoilicornis a. sp. —Rather robust, dark rufo-castaueous; elytra 

 dark, obscure rufous; antennas and legs paler, dark rufo-testaceous; integu- 

 ments rather dull, head and elytra more polished; pubescence coarse, rather 

 long, mo lerately dense, suberect, rather conspicuous. Head moderate or 

 rather small, much longer than wide; eyes rather large, very convex, at 

 much less than their own length from the base; sides behind them strongly 

 coarctate to the base which is broadly subsinuate; surface feebly, evenly con- 

 vex, not perceptibly punctate; having on a line through the middle of the 

 eyes two rather large and feebly impressed foveas, mutually more than three 

 times as distaut as as either from the eye; apical fovea slightly smaller 

 but more widely and deeply impressed; antennal emarginations rather ap- 

 proximate, angular; apex slightly produced, narrow, declivous, with the sides 

 nearly straight and feebly divergent anteriorly; antennae very slender, slight- 

 ly longer than the head aud pronotum together; first and second joints longer 

 than wide, cylindrical, the sec md slightly smaller, three to six each cylindri- 

 cal, slender, more than twice as long as wide, sixth slightly smaller, seven 

 and eight scarcely more robust, the former twice as loug as wide, the latter 

 quadrate, ninth slightly more robust, a little louger than wide, tenth slightly 

 wider than loug, two-thirds wider thau the ninth, sligh'ly trapezoidal, elev- 



