292 CALIFORNIA ACADEMY OF SCIENCES. 



C. gracilis, n. sp.— Slender; surface polished; black, abdomen slightly 

 paler toward base; legs piceoiis-black, tips of tibiis and tarsi testaceous' 

 tibiae densely clothed with fulvous pubescence toward the apices; antennas 

 Tjlack throughout; pubescence very fine, rather spar e, recumbent. Head 

 slightly longer than wide, nearly semi-circularly rounded at base from ej'e to 

 eye; the latter not prominent; front and occiput rather stroni^ly convex, 

 •even, very minutely and rather sparsely punctate; anteunse slightly longer 

 than the head and prothorax together, very slender, densely clothed with 

 •cinereous pubescence, especially toward tip; basal joint slightly shorter and 

 very slightly wider than the second, the latter three times as long as wide 

 and slightly longer than the third, joints four to ten, sub-equal in length, the 

 former 'twice as long as wide, the latter very slightly longer than wide, 

 eleventh very long and slender, as long as the two preceding together, very 

 obtusely rounded at apex. Prothorax very slightly narrower than the head, 

 •widest at two-fifths its length from the apex where it is distinctly narrower 

 than long; sides strongly convergent to the apex just before which they are 

 very feebly simiate, feebly convergent to the base and nearly straight; biise 

 very broadly and feebly arcuate, five-sixths as wide as the disk and four-fifths 

 wider than the apex; basal angl-s obtuse and very narrowly rounded; disk 

 evenly and moderately convex, finely but strongly margined along the base 

 and sides, vaguely and very feebly eroded trausvei'sely near the base, finely 

 and rather closely punctate; punctures slightly larger than those of the head. 

 Elj'tra at b.ise nearly one-half wiJer than the pronotum; sides feebly but dis- 

 tinctly convergent toward the apices, feebly arcuate, more strongly so pos- 

 teriorly; apex feebly incurvate and strongly trisinuate; disk rather convex, 

 impressed behind the scutellum, very slightly wider than long, coarsely 

 strongly and rather densely punctate near the scutellum, the punctures be- 

 coming much finer and more distant toward the outer apical angles. Abdo- 

 men at ba'-e much narrower than the elytra and scarcely as wide as the pro- 

 notum, widest at the base of the fourth visible segment where it is one-half 

 wider than at base; border strong but not deep; each of the three basal seg- 

 ments extremely closely and coarsely punctate and transverselj'^ impressed 

 at base, and all the segments very minutely and rather spar.sely punctate 

 upon the remainder of the disk; underside minuteiy and sparsely punctate. 

 Legs slender; first joint of the x'osterior tarsi as long as the next two 

 together. Length, 2.7-3.3 mm, 



California, (Hoopa Val., Humboldt Co. 10; Anderson 

 Yal., Mendocino Co. 1). 



In the males the terminal ventral segment is triangularly 

 produced and acute at apex, with the sides very feebly sin- 

 uate; in the female this segment is rather broadl}' and evenly 

 rounded behind, the first two joints of the antennse nearly 

 •equal in length, longer than the third, and the pronotum is 



