34 



NORTH AMEEICAN FAUNA. 



[No. 36. 



Petaluma, while their skulls can be matched very closely in the series 

 of megalotis. The type of "IclamatTiensis^^ is a very old individual 

 and has a skull as large as that of R. m. aztecus. Skulls of topotypes, 

 however, do not differ appreciably from skulls of megalotis from the 

 Death Valley region. Reithrodontomys "pallidus ' ' of Rhoads is a pure 

 synonym of longicaudus, neither the type nor topotypes being distin- 

 guishable from typical specimens of this race. Color variation in 

 this subspecies is considerable and the winter and summer pelages 

 are strikingly different. 



Specimens examined. — ^Total number, 555, from the following locali- 

 ties: 



Oregon: Grants Pass, 1.^ 



California: Adobe Station, 1;^ Alton Junction, Humboldt County, 3; Aptos, 15; 

 Armona, 1; Arroyo Seco, 10 miles south of Paraiso Springs, 4; AiToyo Seco 

 Canyon, near Pasadena, 1;^ Ballena, San Diego County, 3; Banta, 8; Bear 

 Valley, head of Carmel River, 2; Bear Valley, San Benito County, 1; Berg- 

 man, Riverside County, 1; Berkeley, 31; Boulder Creek, 2; Briceland, 2; 

 Burbank, 4; Calabasas, 1; Cameron's Ranch, San Diego County, 1; Campo, 

 San Diego County, 1; Carlsbad, San Diego County, 3; Carpenteria, 2; Chico, 6; 

 Chinese Camp, 1 ; Church Ranch, 5 miles north of Tassajara Springs, 2 ; Dulzura, 

 1; El Nido, Jamul Creek, 9; Elsinore, 2; Eshom Valley, Tulare County, 1; 

 Fairfield, 3; Fort Bragg, 1; (old) Fort Tejon, 1; Freestone, 2; Fremont Peak, 

 Gabilan Range, 3; Fresno, 3; Fresno Flat, 4; Gaviota Pass, 5; Gilroy, 2; Glen 

 Ellen, 10; Hueneme, 3; Humboldt Bay, 3; Jackson, 1; Jacumba, 8; James- 

 burg, 5; Jolon, 4; King City, 1; Lagunitas, 1; Las Virgines Creek, 2; Layton- 

 ville, 1; Lebec, 1; Leesville, 6; Lemoore, 2; Los Banos, 1; LosOlivos, 2; Lower 

 Lake, 3; Ly tie Creek, Los Angeles County, 2; Martinez, 1; Marysville, 6; Marys- 

 ville Buttes, 12; Mendota, 2; Milpitas Ranch, south base Santa Lucia Peak, 3; 

 Milquatay Valley, 1; Modesto, 1; Mono Flats, Santa Ynez River, 2; Montalvo, 

 3; Monterey, 16; Morro, 2f Mountain Spring, San Diego County, 3; Mount 

 George, 2; Mount St. Helena, 2; Nelson, Butte County, 2; Nicasio, 5; Novate, 

 3; Oakland, 1; Oceanside, 1; Orosi, 2; Pacheco Pass, Santa Clara County, 1; 

 Pacific Grove, 3; Pacific Ocean, near Mexican boundary, 6; Palo Alto, 1; 

 Paraiso Springs, 8;^ Paso Robles, 5; Petaluma, 6;^ Petrolia, 9; Pine Valley, 

 ^ Monterey County, 1; Point Reyes, 19; Porterville, 1; Posts, 5; Pozo, 3;^ 

 Radec, Riverside County, 2; Riverside, 5; Rockport, 5; Salinas, 4; San 

 Bernardino, 13;^ San Bernardino Mountains (altitude 5,200 feet), 6; San 

 Diego, 6; San Emigdio Canyon, 7; San Fernando, 7; San Jacinto, 1; San Luis 

 Obispo, 5f San Marcos, 1; San Mateo, 15; San Pasqual Valley, 1; San Pedro, 

 1; San Simeon, 5; Santa Barbara, 2; Santa Maria, 3; Santa Monica, 4; Santa 

 Paula, 17 f Santa Ynez Mission, 4; Santa Ysabel, 5; Santiago Springs, San 

 Luis Obispo County, 1;^ San Ygnacio Valley, San Diego County, 1; Shasta 

 Valley, 7f Soledad, 2f Stanford University^ 22; Strawberry Valley, San 

 Jacinto Mountains, 3; Sur, 6; Sur River, 6; Tecate Valley, 3; Tecelote Canyon, 

 1; Tehama, 4; Tejon Canyon, 3; Temescal, 2; Three Rivers, 1; mouth Tia 

 Juana River, 1; Tracy 10; Twin Oaks, 1; Ventura River, 2; Walnut Creek, 

 20; Warren's Ranch, Riverside County, 1; Westport, 2. 

 Lower California: El Ray o, Hanson Laguna Mountains, 1; La Huerta, Hanson 

 Laguna Mountains, 1; Nachoguero Valley, 2; Rancho Viejo, 15 miles east of 

 Alamos, 1; San Isidro Ranch, near monument No. 250, Mexican boundary, 5. 



1 Collection Field Mus. Nat. Hist. 



^Approaching megalotis. 



3 Collection of Joseph Grinnell. 



