292 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



ished apical area of the corium a very little darker. Basal submargin of 

 the cuneus with a cuneiform line of longer silvery hairs. Membrane ob- 

 scure with a fuscous median cloud. Venter with an oblique area of silvery 

 hairs on either side. 



Described from three male and fourteen female examples 

 taken on willows at San Juan Capistrano, Calif., June 24, 1914. 

 The dull brownish color and pubescent surface will distinguish 

 this species. 



Holotype and allotype in author's collection. 



Paratypes in collection of the California Academy of 

 Sciences and in that of the author. 



22. Pilophorus tibialis, new species 



Allied to clavatus and still more closely to cinnamoptents. 

 Second antennal segment gradually much thickened toward its 

 apex, third fuscous, fourth mostly white ; posterior silvery line 

 on the elytra entire ; hind tibiae flattened and curved ; membrane 

 with a fuscous area overrunning the areoles; apex of the 

 corium polished across its whole width. Length 5 mm. 



Head shaped as in clavatus but somew'hat broader at base ; viewed from 

 before narrower and more pointed than in ama-niis; viewed from the side 

 more depressed and subcarinate below the eye, the apex surpassing the eye 

 by considerably more than the length of the eye ; vertex deeply impressed 

 either side, the median line sometimes broadly, slightly carinate, not at all 

 sulcate; the hind margin more strongly elevated than in either allied 

 species; cheeks pointed at apex, almost attaining the tip of the clypeus, 

 their sides feebly arquated. Antennae about as in ama:nus; the first segment 

 shorter and the third distinctly longer than in that species ; second longer 

 and more clavate than in clavatus, about as in amocniis; fourth segment a 

 little shorter than third and about equal to first. Rostrum attaining tip 

 of intermediate coxae, the basal segment reaching hardly more than half 

 way to the anterior angle of the eye. Pronotum about as in clavatus, 

 shorter and more finely rastrate than in amccnus, distinctly impressed be- 

 tween the callosities. Elytra about as in amcemis, the posterior silvery line 

 often a little sinuated but not dislocated at claval suture ; corium beyond 

 this line polished across its whole width. Hind legs longer than in clavatus, 

 about as in amocnus but with their tibiae still broader and more curved in 

 both sexes, its width at the basal third nearly equal to the width of the 

 femora. Sinistral male clasper transverse, longer than broad, its apex 

 abruptly armed with a small acute, incurved tooth. In amocnus this clasper 

 is more quadrangular with its apical hook scarcely more than an acute 

 tubercle while in clavatus this clasper is lunate with its apex flattened and 

 even broader than the base. 



Color piceous-black, the elytra before the posterior silvery Hne dark 

 cinnamon brown ; head, anterior portion of pronotum and beneath more or 

 less tinged with cinnamon ; the anterior and intermediate tibiae, at least at 

 apex, paler ; base of the vertex and clypeus infuscated in pale examples. 

 Antennae pale brown or tinged with castaneous, the clavate portion of the 



