14 Bulletin of the Brooklyn Entomological Society Vol.X 



California Acad, of Sci., Type locality, Tallac, Lake Tahoe, Cal., 

 Sept., 1903. 



This species, which may vary in size from 4.5—7 mm. in length, 

 has been found in Wash, and in Cal., ranging in the latter state 

 throughout its northern portion except the coast belt and extend- 

 ing along the western flanks of the Sierras to the Walker Basin. 

 It has been found beneath the bark of dead yellow pine (Pinus 

 ponderosa Law.), the Jeffrey pine (Pinus jeffreyi Lem.), and 

 sugar pine (Pinus lambertiana Dougl.) in the sapwood of which 

 it breeds. I have seen their workings extending to a greater 

 depth than six inches. It most likely ranges throughout a good 

 deal of the territory occupied by the western yellow pine and may 

 also be found on other pines than those mentioned. It is our 

 commonest western species and has been confused for a long 

 time with C. piniphilus Boh., from which it is most distinct. Its 

 closest relative in this country is C. texanus which it superficially 

 resembles. The characters of head and thorax will however en- 

 able them to be separated. 



C. quadricoUis n. sp. Black, shining. Head finely and sparsely 

 punctured posteriorly, more coarsely between eyes and on base of 

 rostrum and finer again at apex of rostrum. Eyes not prominent, 

 barely protruding beyond the lateral margin of head, vertex with 

 a definite though not large circular puncture slightly above the 

 eyes, diameter of head across eyes about one third greater than 

 greatest breadth of rostrum. Rostrum about one half the length 

 of thorax, basal portion about equal to apical, slightly longer than 

 broad, with sides decidedly divergent anteriorly, apical portion 

 abruptly dilated, slightly broader than basal, quadrilateral and 

 broader than long. Joints of funicle of antennae gradually in- 

 creasing in width outwards, the outermost about as broad as half 

 diameter of club. 



Prothorax slightly longer than broad, base bisinuate, sides con- 

 stricted at base, rounded and broadest just in front of base, thence 

 just perceptibly convex to near apex where well rounded to con- 

 stricted apex. Surface convex on sides and somewhat flattened 

 above, especially posteriorly, coarsely, regularly and moderately 

 closely punctured at sides, much more finely and sparsely at outer 



