294 CALIFORNIA ACADEMY OF SCIENCES. 



C. valida, a. sp. — Form rather robust; shining; piceous-black, tips of the 

 dorsal segments, particularly the basal, paler, fuscous, tips of the tibite and 

 tarsi reddish-testaceous, antenme scarcely perceptibly paler toward base; 

 pubescence very fine, dense, pale fulvo-cinereous, conspicuous. Head as wide 

 as long, semicircularly rounded behind from eye to eye; occiput strongly 

 convex, veiy minutely evenly and rather densely punctate; antennas not 

 longer than the head and prothorax together, very slender, second joint three- 

 fourths as long as the third which is scarcely as long as the first, remainder 

 nearly as in gracilis, except the eleventh which is distinctly shorter than the 

 two preceding together. Prothorax widest just perceptibly before the mid- 

 dle where it is very slightly narrower than long; sides very strongly converg- 

 ent anteriorly and nearly straight, very feebly convergent posteriorly and 

 just visibly incurvate; base broadly and very feebly arcuate, very slightly nar- 

 rower than the disk and more than twice as wide as the apex; posterior 

 angles slightly obtuse and very slightly rounded; disk as wide as the head 

 rather strongly convex, very finely, evenly and densely punctate. Elytra at 

 base one-half wider than the pronotum; sides parallel and feebly arcuate ex- 

 cept near the apices where they become abruptly strongly convergent to the 

 apical angles which are acute; together strongly incurvate pesteriorly and 

 strongly trisinuate; disk feebly convex, narrowly impressed on the suture 

 toward the scutellum, a little wider than long, much longer than the pro- 

 thorax, coarsely and extremely densely punctate, much more finely and 

 sparsely so toward the exterior apical angles. Abdomen at base scarcely 

 more than one-half as wide as the elytra, and, at the apex of the fourth seg- 

 ment, one-half wider, otherwise as in gracilis except that the punctuation of 

 the posterior segments is slightly denser; underside coarsely and very 

 densely punctate toward base, more finely and distantly so toward the apex. 

 Legs long and very slender; claws very long and slender; first joint of the 

 posterior tarsi slightly shorter than the next two together. Length 4.2 mm. 



California (Yountville, Napa Co., 1). 



This species is the largest of the genus thus far discov- 

 ered; it is easily distinguished from others by its size, more 

 robust form, dense pubescence, very dense elytral punctua- 

 tion, and especially by the very dense punctuation of the 

 underside of the abdomen toward base. The pubescence of 

 the pronotum streams from the middle outwardly and an- 

 teriorly. 



C. exilis, ii- sp. — Form slender; black throughout, tips of tibiae and tarsi 

 dark testaceous; polished; pubescence very fine, rather short and sparse; 

 antennas not paler at base. Head slightly longer than wide; portion behind 

 the eyes slightly longer than in gracilis and more narrowly rounded; occiput 

 very convex, very minutely but distinctly punctate; antennas slightly longer 



