MURIDA—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. 
| roe la , 
3 Falcsl 2 | 
3 Date. Locality. Collector. sees 3) & & Remarks. 
g vi 2S)|au g = oy 
tte bat z ao| 6 a 5 
| 4 | A a tol q a 
| 8373 | o | Feb. 10, 1867 3.20 | 0.33 | 0.76 | 0.67 | Dry. 
| 8875 |....| May 10, 1967 2.75 | 0.31 | 0.74 | 0.56 |....do. 
8876 | op | Apr. 18, 1867 3.30 | 0.32 | 0 78 | 0.69 do 
8877 | go | Feb. 10, 1867 3.00 | 0.31 | 0.78 | 0.61 do 
8880 | og | Feb. 10, 1867 : 3.40 | 0.30 | 0.78 | 0.71 |.-..€o | 
8881 | g | Apr. 18, 1867 .| 2.90 | 3.50 | 0.31 | 0.79 | 0.60 |....do 
| ags2 | 9 | Apr. 16, 1867 .| 3.75 | 3.75 | 0.35 | 0.81 | 0.70 |....do 
| 8886 | ¢ | Apr. 16, 1867 3.40 | 3.25 | 0.33 | 0.81 | 0.66 |..-.do 
(Seether GT -| 3.50 | 3.60 } 0.31 | 0.80 | 0.73 |..-.do 
| 8889 | o | Mar. 10, 1867 -| 3.25 | 3.50 | 0.32 | 0.80 | 0. 67 do 
| 8390 | 9 | May 3, 1867 -| 3.60 | 3.50 | 0.33 | 0.77 | 0.65 do | 
| 8891 | Q | Feb. 10, 1867 3.25 | 3.10 | 0.33 | 0.80 | 0.71 do 
-HESPEROMYS (VESPERIMUS) AUREOLUS, (Aud. & Bach.) Wag. 
Red Mouse; Golden Mouse. 
Mus (Calomys) aureolus, Aup. & Bacu., Journ. Acad. Nat. Sci. Phila. vi, 1842, 302; Q. N. A. ii, 1851, 
303, pl. 95. 
Hesperomys aureolus, WAGNER, Wieg. Archiv, 1843, ii, 51.—ALLEN, Bull. Mus. Comp. Zool. ii, 1870, 180. 
Hesperomys ( Vesperimus) aureolus, COUES, Proc. Acad. Nat. Sci. Phila. 1874, 180. 
? Arvicola nuttalli, HARLAN, Monthly Amer. Journ. 1832, 446; Med. & Phys. Res. 1835, 55, pl. —. 
Hesperomys nuttalli, BARD, M. N. A. 1857, 467. 
Draenosis.—H. staturd formdque Hesp. leucopi ; corpore supra aureo-cin- 
namomeo, auriculis concoloribus, dorso medio obscuriore ; infra luteo-albido. 
Mouse like /ewcopus 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. ‘‘Mammee, four; situated 
far back” (Aud. & Bach.). 
Hasrrat.—Central and Southern States. 
