MAMMALS OF THE MEXICAN BOUNDARY. 



441 



Measurements of 58 spedmens of Peromyscits eremicus anihonyi — Continued. 



Locality. 



Fort Verde, Arizona . 

 do 



Fort Lowell, Pima County, Ril- 



lito Creek, Arizona. 

 ....do 



La Osa, Pima CoUnty, Arizona, 



Monument No. 140. 

 ....do 



.do., 

 .do., 

 .do., 

 .do., 

 .do., 

 .do., 

 .do.. 



Pozo de Luis, Sonora, Mexico. 



.do., 

 .do., 

 .do., 

 .do.. 



Date. 



1887. 

 May 14 

 •Jime 27 



1888. 

 Apr. 23 



1893. 

 Nov. 20 



Nov. 13 

 Dec. 19 



Deo. 20 

 ....do..., 



Deo. 21 

 ....do..., 

 ....do.... 

 ....do.... 



Deo. 22 

 ....do.... 



Dec. 30 



1894. 

 Jan. 1 

 ..-.do... 

 Jan. 3 

 Jan 4 



Sex and 



$ad. 

 cfjuv. 



Sad. 



S ad. 



?ad. 

 9 im. 



?ad. 

 c?ad. 

 ?ad. 

 cfad. 

 J ad. 

 J ad. 

 9 ad. 

 ?juv. 

 c? im. 



?ad. 

 (fiuv. 

 5 ad. 

 (fad. 



Tnm. 

 196 

 164 



196 



196 

 176 



181 



188 



mm. 

 90 

 70 



97 



110 

 92 



109 

 95 



106 

 92 

 90 



110 



mm. 

 22.0 

 21.5 



22.0 

 21.7 



21.0 

 21.0 

 20.5 

 21.5 

 2L0 

 20.0 

 20.0 

 21.0 

 20.0 



20.7 

 20.0 

 24.0 

 20.0 



W 



mm. 

 17.0 

 14.0 



19.0 

 16.0 



16.0 

 16.5 

 15.5 

 17.0 

 16.0 

 16.0 

 14.6 

 ' 16.0 

 13.2 



15.0 

 16.0 

 17.0 

 16.0 



a American Museum of Natural History. 

 PEROMYSCUS EREMICUS ARENARIUS Mearns. 

 EASTERN DESEBT MOUSE. 



Peromyscus eremicus arenarius Mearns, Proc. U S. Nat. Mus., XIX, 1896, p. 138 (p. 2 

 of advaflce sheet issued May 25, 1896; original description). — Milleb and Rehn, 

 Proc. Boat. Soc. Nat. Hist., XXX, No. l,Dec. 27, 1901, p. 73 (Syst. Results Study 

 N. Am. Mam. to close of 1900). 



[Peromyseus eremicus] arenarius, E1.UOT, Field Col. Mus., Zool. Ser., II, 1901, p. 136 

 (Synop Mam. N. Am.); IV, 1904, p. 191 (Mam. Mid. Am.). 



Raton of the Mexicans. 



Type-locality. — Bank of the Rio Grande, about 6 miles above El 

 Paso, El Paso County, Texas. (Type, skin and skull, Cat. No. |MtI, 

 U. S. National Museum.) 



Description. — Similar to tjrpical Peromyscus eremicus, but palfer, 

 with the pelage grayer and more silky, and the ears smaller. The 

 upper surface is pale ochraceous drab finely mixed with black, with- 

 out a d j,rker median area ; ears almost naked, but with a slight pubes- 

 cence on the convex surface; tail dusky drab mixed with hoary above, 



