190 CALIFORNIA ACADEMY OF SCIENCES. 



wider than the head and slightly wider than long; sides rather strongly, 

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

 the basal angles, which are obtuse, not rounded; base broadly, foebly, but 

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

 cate; disk strongly convex, excessively, minutely, sparsely punctate, coarsely 

 so along the basal margin; lateral fovete rather small, not very deeply im- 

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

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

 jDrothorax, at apex more than twice as wide as the latter; sides evenly, not 

 very strongly aicuate; apex trancite, feebly sinuate laterally; disk very 

 sUghtly wider than long, nearly three-fourths longer than the prothorax, 

 evenly, moderately convex, excessively minutely, obsoletely and sparsely 

 punctate; satnral stride deeply impressed, nearly straight; discal fine, dis- 

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

 Abdomen rather elongate, convex; first segment not as long as the next two 

 together; b isal carinae distinctly divergent, separated by distinctly less than 

 one-third the total width, one-half as long as the segment. Legs rather long 

 and slender; hind tibiae not strongly clavate. Length 1.4 mm. 



California; (Mendocino Co., 2). 



Described 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 JiQdiT propinqua Lee, but is not very 

 closely related to any other described species. 



R. gracilicornis ii- sp. — Kather robust, dark rufo-castaneous; elytra 

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

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

 long, molerately 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 iDunctate; having on a line through the middle of the 

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

 times as distant 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 and prouotum together; first and second joints longer 

 than wide, cylindrical, the second 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 long as wide, the latter 

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

 wider than long, two-thirds wider than the ninth, slightly trapezoidal, elev- 



