MAMMALS OF THE MEXICAN BOUNDARY. 



413 



Measurements of 50 specimens of Peromyseus arizonse — Continued. 



Locality. 



Crossing of the Santa Cruz River near 

 Monument No. 118 



.do. 

 .do. 

 .do. 



Ruined mission of Tumacacori, near 

 Tubac, on the Santa Cruz River, 

 Arizona, near Monument No. 127, 



do 



.do. 

 .do. 



20 miles south of Tucson on the Santa 

 Cruz River, Arizona. 



do 



Tucson, Santa Cruz River, Arizona... 



do 



dp 



do 



Date. 



Oct. 24 



....do. 

 ....do. 

 ....do. 

 Oct. 2 



....do. 

 ...do. 

 ...do. 

 Oct. 3 



...do. 



Nov. 



...do. 



...do. 



...do. 



Sex and 



¥ juv- 



cf im. 

 9 im. 

 9 im. 

 9 juv. 



cf juv. 

 9 ad. 

 tf ad. 

 9 ad. 



9 juv. 

 cf ad. 

 cfad. 

 cf im. 

 cTjuv. 



mm. 

 144 



164 

 166 

 157 

 172 



162 

 200 

 190 

 200 



150 

 177 

 160 

 167 

 116 



O w 



mm. 

 21.6 



22.6 

 23.0 

 22.0 

 21.5 



22.3 

 22.0 

 22.0 

 22.0 



22.5 

 21.8 

 21.5 



mm. 

 13.0 



14.0 

 14.0 

 11.5 

 12.0 



13.0 

 13.0 

 15.0 

 14.0 



13.7 

 12.1 

 12.0 



PEROMYSCUS BOYLII (Baird). 

 CALIFORNIA BRUSH HOUSE. 



Hesperomys hoylii Baied, Proc. Acad. Nat. Sci. Philadelphia, VII, p. 335, Apr., 1855 



(original description); Mam. N. Am., 1857, p. 471, pJs. viii, fig. 3; pi. lii, fig. 3 



(description and figures). 

 Peromyseus major Rhoads, Ajnerican Naturalist, XXIX, pp. 831, 832, Sept. 1, 1893 



(Squirrel Inn, San Bernardino County, California). 

 Peromyseus hoylii, Meaens, Proc. U. S. Nat. Mus., XDC, p. 139, Dec. 21, 1896.— 



MiLLEE and Reiin, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, Dec. 27, 1901, 



p. 69 (Syst. Results Study N. Am. Mam. to close of 1900). 

 [Peromyseus": 6oi/Zii, Elliot, Field Col. Mu.^.,Zool. Ser., II, 1901, p. 132 (Synop. Mam. 



N. Am.); IV, 1904, p. 195 (Mam. Mid. Am.). 



Type-locality. — Middle Fork of the American River, Eldorado 

 County, California. (Type, skin — formerly mounted — and skull, Cat. 

 No. ^%S%, U. S. National Museum.) 



Geographical range. — Upper Sonoran and Transition zones of the 

 interior- of California, reaching the coast in southern and Lower 

 California. 



Description. — Upper surface broccoli brown, tinged with cinnamon 

 along cheeks, sides, and rump, and darkened on the back by black- 

 tipped hairs; under surface and feet pure white; orbital area dusky; 

 ears coated with short down of the same color as the surrounding 

 parts; tail bicolor, clove brown above, white below. In winter speci- 



