March, I9I5.] Van Duzee : West Coast Cicadid.e. 35 



dorsal vitta on the tergum, much widened at base, disk of the pleural pieces, 

 at least in part, basal segment of the venter, mostly; sometimes a few small 

 marks on the base of the apical segment, oviduct of the female, a small spot 

 near the apex of the coxec, femora and tibiae and a cloud on the subcostal 

 nervure at the node, sometimes absent. Elytra with a distinct purplish tinge. 



Described from one female and four male examples taken by Dr. 

 F. E. Blaisdell at Mokelumne Hills, Calaveras Co., at an altitude of 

 1, 800 feet. These were found on the manzanita bushes on the red 

 bark of which they were well concealed by their peculiar reddish 

 coloring which is very remarkable in this genus. 



18. Okanagana rubrovenosa Davis, ante. 



This is a small black species with the head, pronotum and mesono- 

 tum clothed with minute dark rufous hairs giving the insect a dull 

 reddish aspect. The wing venation is dark sanguineous becoming 

 orange-red on the base of the hind wings ; the costal nervure beyond 

 the node and the commissural blackish. Uncus of male rather narrow 

 and hooked about as in vandiiscei. This species recalls ai'ctostaphylce 

 but is much smaller and darker. Mr. Davis has kindly sent me for 

 study his male type from Mariposa Co., California. 



19. Okanagana tristis new species. 



Black, less distinctly polished than in rimosa; pronotum proportionately 

 longer and the elytra longer and narrower. Pronotum 4 by 10 mm.; elytra 

 loj/ to II mm. by 33 mm. Color deep black, opaque; supra-antennal plates 

 marked With a small pale point ; mesonotum with the usual six pale marks 

 small and inconspicuous, and there are also two marks on the lateral angles 

 close to the base of the elytra and one on the middle of the lower lateral 

 margin; in some specimens the hind margin of the metanotum is also nar- 

 rowly pale on either side ; margins of the pectoral pieces and coxse, lower 

 surface of the femora and tibiee, edges of the cheeks and front and the 

 median line of the basal segment of the rostrum pale. In the female the 

 sides of the front are concolorous. Venter and genital pieces except the 

 female oviduct, pale, more or less fulvous ; the basal segment with a trans- 

 verse vitta and each segment of the connexivum with a median cloud, black; 

 last ventral segment of the female with an oblique black mark on either side ; 

 slender apical margins of the tergal segments beyond the third pale ; mem- 

 brane of the costal nervure inconspicuously brownish grey. Upper surface 

 sparsely covered with deciduous short white hairs with the usual group of 

 longer whitish hairs in the lateral sinuses of the mesonotal X ; black surfaces 

 beneath clothed with short silvery pubescense and with longer hairs on the 



