MAMMALS OF TI1K MEXICAN BOUNDARY. 



441 



Measurements of 58 specirm ns of Peromyscus en minis antkonyi Continued. 



Museum num- 

 ber. 



528 

 529 



1110 

 2705 



2706 



2707 

 271-1 

 2715 

 2716 

 2719 

 2722 

 2723 

 2751 



2752 

 2753 

 2756 

 2761 



Locality. 



Fori Verde, Arizona 

 do 



Date. 



Fort Lowell, Pima County, Ril- 



litO Creek, Arizona. 

 ....do 



La Osa, Pima County, Arizona, 



Monument No. 140. 

 (Li 



....do 



....do 



....do 



....do 



....do 



....do 



....do 



Pozo de Luis, Sonora, Mexico. 



.do. 

 .do. 

 .do. 

 .do. 



1887. 

 May 14 

 •June 27 



L888. 

 Apr. 23 



L893. 

 Nov. 20 



Nov. 13 

 Dee. 19 



Dec. 20 



....do.... 

 Dec. 21 

 ....do.... 

 ...do.... 

 ...do.... 

 Dec. 22 

 ...do.... 

 Dec. 30 



1894. 

 Jan. 1 

 ...do.... 

 Jan. 3 

 Jan 4 



Sex and 

 age. 



? ad. 



' jllV. 



$ad. 



cfad. 



9 ad. 



, im. 



? ad. 

 cfad. 

 9 ad. 

 cfad. 

 ' ad. 

 cfad. 

 9 ad. 

 9 juv. 

 cf im. 



? ad. 



' juv. 

 9 ad. 

 cfad. 



/;/ /;/ . 

 196 



H',1 



195 



196 

 176 



181 



l.ss 



199 

 179 

 187 

 183 

 165 

 175 



191 

 176 

 204 

 183 



;// in . 

 90 

 70 



110 

 92 



93 



102 



109 

 95 



106 

 92 



90 

 96 



103 

 96 



110 

 99 



mm. 

 22.0 

 21.5 



22.0 



21.7 



21.0 

 21.0 

 20. 5 

 21.5 

 21.0 

 20.0 

 20.0 

 21.0 

 20.0 



20.7 

 20.0 

 24.0 

 20.0 



H 



mm. 

 17.0 



1 I. il 



1S.0 



19.0 

 16.0 



15.0 



16.5 

 15.5 



17.0 

 15.0 

 16.0 

 14.5 

 15. 

 13.2 



15. 



16.0 

 17.0 

 15.0 



a American Museum of Natural History. 

 PEROMYSCUS EREMICUS ARENARIUS Mearns. 

 EASTERN DESERT MOUSE. 



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

 of advance sheet issued May 25, 1896; original description). — Miller and Rehjt, 

 Proc.Bost, Soc. Nat. Hist., XXX, No.. 1, Dec. 27, 1901, p. 73 (Syst. Results Study 

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



[Peromyscus eremicus] arenarius, Elliot, 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 fche Rio Grande, about 6 miles above El 

 Paso, El Paso County, Texas. (Type, skin and skull. Cat. No. V-,'1 1 1, 

 U. S. National Museum.) 



Description. — Similar to typical Peromyscus eremicus } but paler, 

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

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

 out a darker median area: ears almost naked, but with a slight pubes- 

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



