Vol. VII] GIFFARD— CALIFORNIA HEMIPTERA 305 



Head large, distinctly broader than the pronotum, strongly produced. 

 Vertex convex, forming a right angle at apex, its median length equal to 

 its basal width; front prominent, convex, sides nearly parallel below the 

 base of the antennse. Elytra with five apical areoles, the second triangular 

 and pedunculate. Last ventral segment of the female rather strongly pro- 

 duced with its apical margin entire. Male plates triangular, the sides 

 nearly rectilinear to the subacute tips. 



Color yellowish-green, the tibiae becoming blue at apex. Vertex some- 

 times tinged with orange, with a paler spot on either side, often with a 

 darker mark either side of a pale median line ; base of front marked with 

 a pale dot at apex placed in a square of four similar dots and usually 

 there are two others on either side; apex with a pale median vitta ; cheeks 

 with about three elongated pale marks. Pronotum and scutellum san- 

 guineous-brown, the former with three conspicuous whitish spots on the 

 anterior margin, the latter with a darker spot at each angle and a median 

 transverse row of three pale points just below the incised line. Elytra 

 subhyaline, irregularly mottled with yellowish, the tip of the clavus with 

 a conspicuous rufous-brown spot ; apex, from a little before the transverse 

 nervures, deeply infuscated, with strong pale nervures. Abdomen often 

 pale yellow at base and green at apex. 



Described from thirty specimens taken by Mr. Giffard at 

 I-os Altos, July 26, 1916, on pitcher-sage (Sphacele colycina), 

 and at Westpoint on Mt. Tamalpais, 1300 feet elevation, Au- 

 gust 16, 1916. 



Holotype (No. 371), female, from Los Altos, in collection 

 of the California Academy of Sciences. 



Allotype, male, from Los Altos, in collection of Mr Gif- 

 fard. 



Paratypes in both collections and in that of the author. 



311. Empoasca mali (LeB.) Niles Canyon, September 2, 

 1916; Laurel Dell, Lake Co., August 3, 1916. 



312. Empoasca viridcscens Walsh. Los Altos, July 26, 

 1916; Santa Cruz Co., 1200 feet, June 8, 1917; Monterey 

 Co., June 10, 1917; Muir Woods, August 16, 1916; Niles 

 Canyon, May, 1916; June 13, 1917; July 24, 1916; Walnut 

 Creek, August 10, 1916; near Stockton, May 30, 1917; Wa- 

 wona, June 17, 1916; Fallen Leaf Lake, August 21, 1916; 

 Ashland, Oreg., July 10, 1917. 



313. Empoasca birdii Godg. San Mateo Co.. 300 feet 

 June 25, 1917. 



314. Typhlocyha coUina Flor. Muir Woods, July 15, 

 1917; Niles Canyon, June 13. 1917; Walnut Creek. May 

 13, 1917. 



315. Empoa commissuralis (Stal). Tahoe City, Au^^ust 

 23, 1916. 



