NEW NORTH AMERICAN PSELAPHID.E. 481 



slightly wider than long, feebly convex, having a transverse anteriorly arcu- 

 ate impression near the base which terminates laterally in two small puncti- 

 form fovete and which is more deeply impres-ed in the middle, also just be- 

 fore the middle two minute punc;iform fovea, separated by one-fifth the en- 

 tire width, and at each edge at one-fourth the length from the base, a large 

 disconnected deeply impressed fovea, the impression being continued more 

 feebly to the basal angles. Elytra depressed, at the humeri slightly wider 

 than the pronotum; sides nearly parallel, more strongly arcuate behind; to- 

 gether truncate at apex, nearly as long as the heai and prothorax together; 

 sutural stride deeply impressed, beginning at a slight distance from the base; 

 discal broadly impressed, vanishing near the middle, coarsely foveo-punc- 

 tate; between this and the sutural a few foveate imnctures near the base ar- 

 ranged longitudinally. Abdomen slightly longer and wider than the elytra; 

 border wide, slightly inclined; first visible dorsal much shorter than the sec- 

 ond, having near the apex a transverse interrupted spongiose line. Legs 

 rather short and robust. Length 1.4-1.6 mm. 



California (Mendocino Co. 8). 



This species was found rather abundantly under the bark 

 of fallen trees in the Anderson Valley; it differs from par- 

 viceps in its larger head, and from isaheUce in color and in 

 its less robust form. 



S. Cavifrons n- sp. -Slender, depressed, pale testaceous throughout; pu- 

 bescence fine, short, suberect, not d^-nse; integuments polished. i/eacZ small, 

 much smaller and narrower ihan the prothorax, as long as wide, eyes moder- 

 ate in size, prominent, finely granulate; gense convergent, rounded, not at 

 all prominent, as long as the eyes; base feeblj'- sinuate; surface impunctate, 

 having posteriorly two small round feebly impressed foveae, mutuall}^ slightly 

 less distant than either from the eye, and, just behind the strongly elevated 

 transverse frontal ridge, a longitudinally elongated, very deeply excavated 

 fovea which is slightly spongiose and more attenuated posteriorly; antenuce 

 slender, slightly longer than the head and prothorax together; first joint 

 longer than wide, robust, oval, second shorter, less robust, oval, one-half 

 longer than wid^, third small, narrowest, four to seven subequal, much 

 larger than the third, joints three to seven slightly longer than wide, eight 

 as wide as long, nine and ten slightly larger, very little wider than long, 

 eleventh slightly wider than the teath, longer than wide, acuminate, shorter 

 than the two preceding together. Prothorax widest at one-third the length 

 from the apex, where it is distinctly wider than long; sides strongly rounded, 

 convergent and sinuate toward base; the latter bioadly arcuate, three-;ourths 

 as wide as the disk, more than one-third wider than the apex. Elytra at the 

 humeri distinctly wider than the prothorix; sides feebly divergent, more 

 strongly arcuate behind; together slightly longer than wide, as long as the 



34— Bull. Cal. Acad. Sci. II. 8. Issued August 19, 1887. 



