jS^orth America7i Rhyncliophora, 275 



well as in the structure of the antennaB, tarsi, and elytra. Those 

 before me may be easily identified as follows: — 



Antennal scape long, slender, passing distinctly beyond the posterior 

 margin of the eyes. 



Elytra tumid at the sides along the humeral interval lateralis 



Elytra evenly convex at the sides. 

 Elytral setae fine and hair-like; pronotal scales very elongate. 

 Second abdominal segment much ghorter than the next two com- 

 bined; anterior tibiae evenly arcuate within califoriiicu§ 



Second abdominal segment fully as long as the next two com- 

 bined; anterior tibiae feebly emarginate within, near the 



apex c ferrugiiieus 



Elytral setae in the form of elongate scales; pronotal scales short,. 



broadly oval ciiier eus 



Antennal scape very short, robust, and arcuate, just passing the pos- 

 terior margin of the eyes cra§sicoriiis 



Lateralis is a distinctly specialized form, differing greatly 

 from the other species in the prominently elevated humeral in- 

 terval of the elytra, and its larger and less prominent eyes. 



The species californicus Horn is quite abundant in the foot 

 hills of the Sierras near Sacramento. 



S. lateralis n. sp. — Form oblong, rather depressed, densely clothed 

 with finely strigose scales which are twice as long as wide, and acutely 

 pointed, scales subcupreous in color, cinereous at the sides and beneath; 

 each of the small punctures of the elytral stri^ bearing a minute robust 

 seta, otherwise devoid of setae, except beneath, where they are fine, 

 rather long, and sparse on the abdomen; integuments black, legs and 

 antennae rufous. Head and beak together evenly conical, convex, 

 densely punctate, with a small, very deep fovea in the middle of a line 

 through the anterior margin of the eyes, which is continued anteriorly 

 to the posterior tumid margin of the apical impression; the latter large, 

 occupying two-fifths the entire length of the beak, inclosing a pos- 

 teriorly arcuate, lunate, squamose area of scales, otherwise smooth, 

 polished, and almost impunctate, having on each side an oblique line of 

 three long discal setae; scrobes apical, small, deep, irregularly puncti- 

 form, far in advance of the eyes; antennae long and slender; scape very 

 slender, not quite reaching the anterior margin of the prothorax; ab- 

 ruptly, but moderately clavate at apex; funicle slender, longer than the 

 scape; outer joints not at all enlarged, all longer than wide; basal joint 

 very long, slender, as long as the next two together; fifth joint shortest, 

 sixth and seventh equal in length; club elongate, slender. Prothorax 

 nearly one-half wider than long, widest distinctly before the middle; 

 sides feebly arcuate, thence extremely feebly convergent and very feebly 

 arcuate to the base, more rapidly convergent and distinctly sinuate to 



