MUKIDiE— SIGMODONTES— H. LEUCOPUS EREMICUS. 



91 



or three of the twelve, a slight hairiness of the soles, in varying degree, 

 is evident, and the tail is noticeably shorter than the head and body ; the ears, 

 likewise, are not so large. 



The rest of Dr. Palmer's specimens, ten in number, all taken in the same 

 place and at the same time as the others — the two forms living side by side — 

 are all distinctly referable to sonoriensis. They are elsewhere tabulated and 

 commented' upon. 



Table XXIV. — Measurements of twelve additional specimens of Hesperomys leucopus eremicus. 



Feb. 10, 

 May 10, 

 Apr. 18, 

 Feb. 10, 

 Feb. 10, 

 Apr. 18, 

 Apr. 10, 

 Apr. 16, 



Mar. 10, 

 May 3, 

 Feb. 10, 



1867 

 1867 

 1867 

 1867 

 1867 

 1867 

 1S67 

 1867 

 1867 

 1807 

 1867 

 1867 



Locality. 



Camp Grant, Ariz . 

 do 



do .. 



do .. 



do .. 



do .. 



do .. 



do .. 



do .. 



do .. 



do .. 



do .. 



Collector. 



E. Palmer. 

 do ... 



.do 



.do 



.do 



.do 



.do 



.do 



.do 



do 



.do 



.do 



HESPEROMYS (VESPEPJMUS) AUREOLUS, (Aud. & Bach.) Wag. 



Red Mouse ; Golden Mouse. 



Mus (Calomys) aitreoJus, Aud. & Bach., Journ. Acad. Nat. Sci. Phila. vi, 1842, 302; Q. N. A. ii, 1851, 



303, pi. 95. 

 Hesperomys aureolas, Wagner, Wieg. Archiv, 1843, ii, 51. — Allen, Bull. Mus. Corup. Zool. ii, 1870, 180. 

 Hesperomys ( Vesperimus) aureolus, Codes, Proc. Acad. Nat. Sci. Pbila. 1874, 180. 

 f Arrieola nuttalli, Harlan, Monthly Amer. Journ. 1S32, 446; Med. & Phys. Res. 1835, 55, pi. — . 

 Hesperomys nuttalli, Baird, M. N. A. 1857, 467. 



Diagnosis. — H. statura formdque Hesp. leucopi ; cor pore supra aureo-cin- 

 namomeo, auriculis concoloribus, dorso medio obscuriore ; infra luteo-albido. 



Mouse like leucopus in size and shape, but very different in color, being 

 golden-cinnamon above, and yellowish-white or pale buff below ; ears agree- 

 ing with the general tint of the upper parts; middle back darker from 

 admixture with blackish hairs; fore legs colored to the wrist ; the dividing 

 line between the color of the upper and under parts of the body and tail 

 usually indistinct. Feet densely pilous above, and below to the tubercles, 

 which are large and crowded ; toes rather short. "Mammas, four; situated 

 far back" (Aud. & Bach.). 



Habitat. — Central and Southern States. 



