MAMMALS OF THE MEXICAN BOUNDARY 



413 



Measun nu nis of 50 specimens ofPeromyst us arizona < lontin I. 



Museum 

 number. 



58776 58776 



58777 

 58768 



58787 

 - 58782 



58793 



58809 

 58805 

 58761 



58777 

 58768 



5S7S7 



58809 

 58805 



2616 

 2617 



2619 

 2634 



2635 



2637 

 2039 



Locality. 



Crossing of \\w Santa Cruz River near 



Monument No. 1 18 



....do 



Ruined mission of Tumacacori, near 

 Tubac, on the Santa Cruz River, 

 Arizona, Dear Monument No. 127 



....do 



....do 



....do 



20 miles south of Tucson on the Santa 



Cruz River, Arizona. 



do 



Tucson, Santa Cruz River. Arizona . 



....dp 



....do 



.do. 



Sex and 

 age. 



1893. 

 Oct. '- 



do 

 do 

 do. 

 Oct. . 



...do 



...do 

 ...do. 

 Oct. : 



...do. 



Nov. 



...do. 



...do. 



...do. 



i juv. 



' JUV. 



, ad. 

 ' ad. 

 j ad. 



i juv. 

 ' ad. 

 fad. 



' iin. 

 ' juv. 



Ill III . 



I It 



' im. H'l 



, im. 166 



J im. 157 



9 juv. 172 



150 

 177 

 160 

 167 

 116 



162 

 200 

 190 85 

 200 93 



m in . 

 21.5 



22.5 

 23 

 22.0 

 21.5 



22. 3 



22.0 

 22.0 



in in . 

 13.0 



14.0 

 14.0 

 11.5 

 12.0 



13.0 



13 (i 

 15. 



11.0 



63 ... 



80 22.5 13.7 



71 21.8 12.1 



21. 



12. (I 



PEROMYSCUS BOYLII (Baird). 

 CALIFORNIA BRUSH MOUSE. 



Hesperomys boylii Baird, Proc. Acad. Nat. Sci. Philadelphia, VII, p. 335, Apr.. 1855 



(original description); Mam. N. Am., 1857, p. 471. pis. vm, fig. 3; pi. i.n, fig. 3 



(description and figures). 

 Peromyscus major Rhoads, American Naturalist, XXIX, pp. 831, 832, Sep! . ], 1893 



(Squirrel Inn, San Bernardino County, California). 

 Peromyscus boylii, Mearns, Proc. U.S. Nat. Mus., XIX, p. 139, Dec. 21, 1896.— 



Mii.i.er 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). 

 [Peromyscus^ boylii, Elliot, Field Col. Mus.,Zool. Ser., II, 1901, p. 132 (Synop. Mam. 



N. Am.); IV, 1904, p. 19.5 (Mam. Mid. Am.). 



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

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

 No. yVto* U. S. National Museum.) 



Geographical range. — Upper Sonoran and Transition /ones 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 hack 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- 



