500 BULLETIN 56, UmTBD STATES NATIONAL MUSECTM. 



Mexican Boundary. Everywhere in the shade of rank growths of cat- 

 tail, sedge, and rush, beside the stream, we could see their much- 

 trodden paths; but the little beasts were so difficult to trap that we 

 only obtained three of them, all caught in daytime. A female taken 

 by Mr. Holzner on June 27 contained four fetuses. 



Note. — The following species of voles are slightly extralimital, not 

 being known to occur south of the Southern Pacific Railroad : 



MICROTUS MONTANUS ARIZONENSIS Bailey. 

 ARIZONA MEADOW-MOTTSE OR VOLE. 



Microius monianus arizonensis Bailey, Proc. Biol. Soo. Washington, XII, p. 88, Apr. 30, 

 1898 (original description) ; North American Fauna, No. 17, June 6, 1900. — Mil- 

 ler and Rehn, Proc. Bost. Soc. Nat. Hist., XXX., No. 1, Dec. 27, 1901, p. 119 

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



[Microtus monianus] arizonensis, Elliot, Field Col. Mus., Zool. Ser., II, 1901, p. 184 

 (Synop. Mam. N. Am.). 



Type-locality. — Springerville, .^pache County, Arizona. 



MICROTUS ALTICOLA (Merriam). 

 SAN FRANCISCO MOUNTAIN VOLE. 



Arvicola (Mynomes) alticolus Mekeiam, North Americap Fauna, No. 3, Sept. 11, 1890, 



pi. V, figs. 1 and 2; pi. vi,.figs. 1-4 (original description). 

 Microtus alticolus, Allen, Bull. Am. Mus. Nat. Hist., VII, p. 219, June 29, 1895. — 



Bailey, North American Fauna, No. 17, June 6, 1900, p. 52 (Revision of American 



Voles of the genus Microtus). 

 Microtus alticola. Miller and Rehn, Proc. Bost. Soc. Nat. Hist., XXX, No. 1, Dec. 27, 



1901, p. 123 (Syst. Results Study N. Am. Mam. to close of 1900).— Elliot, Field 



Col. Mus., Zool. Ser., II, 1901, p. 192 (Synop. Mam. N. Am.). 



Type-locality. — Little Spring, San Francisco Mountain, Coconino 

 County, Arizona. . Altitude, 8,200 feet. 



MICROTIS ALTICOLA LEUCOPHiEUS (Allen). 

 GRAHAM MOUNTAIN VOLE. 



Arvicola leucophieus Allen, Bull. Am. Mus. Nat. Hist., VI, Nov. 7, 1894, p. 320 (orig^ 



inal description). 

 Microtus alticolus leucophseus, Bailey, North American Fauna, No. 17, June 6, 1900, 



p. 53 (Revision of American Voles of the genus Microtus). 

 Microtus alticola leucophieus. Miller and Rehn, Proc. Bost. Soc. Nat. Hist., XXX, 



No. 1, Dec. 27, 1901 (Syst. Results Study N. Am. Mam. to close of 1900). 

 [Microtus alticola] leucophseus, Elliot, Field Col. Mus., Zool. Ser., 11, 1901, p. 192 



(Synop. Mam. N. Am.). 



Type-locality. — Graham Mountains, Graham County, Arizona. 



