Vol. VII] GIFFARD— CALIFORNIA HEMIPTERA 251 



Walnut Creek, Contra Costa Co., by road about four miles 

 west of town. 



Mt. Diablo, Contra Costa Co., at 1400 feet, at the summit, 

 3800 feet elevation, and at Mt. Diablo Park, at base of moun- 

 tain. 



San Joaquin Co.. work near Stockton on May 30, 1917, and 

 near Tracy on May 31, 1917. 



Hoberg's Resort, Lake Co., and along- the road to Lake- 

 port, about 2500 feet elevation. 



Clear Lake, Lake Co., on lake shore near Lakeport. 



Blue Lakes, Lake Co., mostly at Laurel Dell on the lower 

 lake. 



Witter Springs, Lake Co.. near Blue Lakes. 



Sonoma Valley, Sonoma Co., work on oak and manzanita 

 on the hills at the upper end of the valley beyond Cloverdale. 



Hamilton Station, Tuolumne Co. 



Wawona, Mariposa Co. 



Placer Co., along road from Sacramento to Placerville and 

 from Placerville to Lake Tahoe, 3900 feet to 5500 feet 

 elevation. 



Fallen Leaf Lake, Eldorado Co., 6300 feet elevation, mostly 

 along the road to Glen Alpine Springs. 



Tallac at southern end of Lake Tahoe, 6000 feet elevation. 



Tahoe City and along road from Tahoe to Truckee, about 

 6000 feet elevation. 



Donner Lake, Placer Co., work near borders of lake at about 

 6000 feet elevation. 



Summit Station, Placer Co., 7000 feet elevation. 



Soda Springs, Placer Co., 6600 feet elevation. 



List of the Species 



1. HomcBmus (Tueifrons (Say). Summit, August 24, 1916. 

 One adult with young. 



2. Homccmiis bijugis Uhl. Tallac, August 22, 1916. Fallen 

 Leaf Lake, August 21, 1916. 



3. Eurygastcr altcniatus (Say). Crystal Springs, June, 

 1916, abundant on the swampy margins at the upper end of the 

 lower lake; Redwood Canvon, August 6, 1916; Tallac, August 

 23, 1916. 



