118 University of California Publications in Zoology  [Vou. 17 
uniform black to ight gray, greenish or brownish, with darker mark- 
ings, if present, usually indistinct; there is always a patch of lighter 
color on top of head between nares and eyes, and behind this a darker 
area crossing posterior half of each eyelid and merging insensibly be- 
hind into the general dorsal coloration. Boylii is the smallest of the 
three subspecies, reaching a maximum body-length of only about 66 
millimeters. 
Material—One hundred and seventy-seven specimens of R. b. 
boylw are contained in the Museum of Vertebrate Zoology, from the 
following localities in California: Cuddeback, Humboldt County; 
eight miles east of South Yolla Bolly Mountain, Trinity County ; 
vicinity of Covelo, vicinity of Sherwood, near Mount Sanhedrin, and 
Gualala, Mendocino County ; Gualala River, Freestone, and eight miles 
west of Cazadero, Sonoma County; Fairfax, San Anselmo, Lagunitas 
Creek, and Muir Woods, Marin County; Mill Creek near Tehama, 
Tehama County ; Chambers Ravine near Oroville, Butte County ; Wins- 
low near Fruto, Glenn County ; near Vacaville, Solano County ; vicinity 
of Mount Diablo, Contra Costa County; Berkeley, Alameda County ; 
Corral Hollow, San Joaquin County ; Sweeney’s ranch, 22 miles south 
of Los Banos, Mereed County; Fyffe (3600 feet altitude), El Dorado 
County; Pleasant Valley (600 feet), vicinity of Coulterville (3000- 
3200 feet), and near Feliciana Mountain (3800 feet), Mariposa 
County; Farrington’s ranch (6800 feet), near Williams Butte, Mono 
County; and Kern River near Bodfish, and Fay Creek (4100 feet), 
six miles north of Weldon, Kern County. 
Distribution Except for a small area in southwestern Oregon, 
the range of Rana boylw boylii seems to lie entirely within the state 
of California. It includes the northwestern part of the state, east to 
the MeCloud River, Shasta County, and to the western foothills of the 
Sierra Nevada below 4100 feet altitude. The form oceurs also at 
Mono Lake; in the Sierras it has been taken south to the vieimity of 
Walker Pass, Kern County; but where it meets the range of R. b. 
muscosa along the coast is not known. Specimens from the vicinity 
of Walker Pass show a more contrasted pattern of coloration, possibly 
indicating approach to the southern subspecies, deseribed next below. 
Rana boylii muscosa, new subspecies 
Sierra Madre Yellow-legged Frog 
Type.—Female, adult; no. 771, Mus. Vert. Zool.; Arroyo Seco 
Canon, at about 1300 feet altitude, near Pasadena, California; August 
3, 1903; colleeted by J. Grinnell. 
