192 CALIFORNIA ACADEMY OF SCIENCES. 



impression finely punctate, having at the bottom a smaller circular fovea; 

 antennae short and robust, not as long as the head and prothorax together, 

 club robust, second joint subcylindrical, longer than wide, slightly narrower 

 than the first, three to eight narrower, subequal in width, third, fifth and 

 sixth slightly longer than wide, fourth and seventh subquadrate, eighth 

 smallest, wider than long, eight to eleven increasing evenly and very rapidly 

 in width, ninth and tenth strongly transverse, eleventh slightly longer than 

 wide, obtusely and obliquely acuminate. Prothorax widest at one-third the 

 length from the apex, where it is very slightly wider than the head and one- 

 fifth wider than long; sides rather strongly, narrowly rounded, moderately 

 convergent and nearly straight toward base, just before which they are very 

 feebly sinuate; base three-fourths as wide as the disk, one-third wider than 

 the apex; the latter transversely truncate; disk strongly convex, scarcely 

 perceptibly, sparsely punctate; lateral foveae moderate, at two-fifths the 

 length from the base; median small, distinct, not at all elongate. Elytra at 

 base distinctly wider than the prothorax, at apex distinctly more than twice 

 as wide as the latter; sides evenly, rather strongly arcuate; disk moderately 

 convex, scarcely perceptibly punctate; sutural striae deeply impressed, nearly 

 parallel; discal rather strongly arcuate and deeply impressed, terminating at 

 one-fifth the length from the apex; together distinctly wider than long, two- 

 thirds longer than the prothorax. Abdomen moderately convex; basal seg- 

 ment as long as the next two together; carinas distant by two-fifths the entire 

 width, very short, distinctly less than one-third as long as the segment, dis- 

 tinctly divergent, nearly straight. Legs slender, j)osterior tibiae feebly 

 clavate, strongly arcuate. Length 1..3 mm, 



Nevada; (Eeno, Washoe Co. 3). 



The sexual characters appear to be very slight, but there 

 is apparently very little doubt that it belongs in the rubi- 

 cunda group of species. It may be readily distinguished 

 by the transverse impression between the antennae and the 

 ver}^ short basal carina of the first dorsal segment; in the 

 type these are scarcely more than one-sixth or one-eighth 

 -as long as the segment, but in another specimen which has 

 shorter antennae, and therefore probably the female, they 

 are more than one -fourth as long as the segment. The pos- 

 terior tibiiTB are unusually strongly arcuate. 



R. fandata u- sp.— Moderately robust, piceous-black; elytra rufous, 

 clouded slightly darker at apex and base; antennce dark brownish-piceous; 

 legs dark brownish-piceous, femora more rufous; integuments polished; pu- 

 bescence fine, very short, somewhat dense on the abdomen. Head moderate, 

 wider than long; eyes moderate, at less than their own length from the base; 



