MAMMALS OF THE MEXICAN BOUNDARY. 177 



inguinal region, underside of tail, chin, throat, and inner sur- 

 face of upper part of limbs, while. Top of head dusky brownish 

 in the median urea. A younger female (No. 20571, I'.S.X.M.i. 

 from the San Luis Mountain'-, contained two small fetuses, and was 

 still in winter pelage when killed. June 1!>. 1892. A young male 

 ( Xo. •_'():.('.:». U.S.N.M.), killed at Cloverdale, Grant County. New 

 Mexico. July 15, 1892, was still in winter coat. Still another young 

 male (X<». 21394, U.S.N.M.), taken on San Bernardino River. So- 

 nora. August 1'.'. 1893, was in summer pelage; hut an immature 

 female (Xo. 21413, LJ.S.N.M.), from the Guadalupe Mountains, 

 south of Monument No. 73, was just acquiring the summer pelage on 

 its feet. August 26. L893. An old male (No. 58928, U.S.N.M.), 

 killed on Cajon Bonito Creek, Sonora, August 29, L893, i> in the 

 tawny summer coat, except on the sides, where the summer hair 

 has fallen out in masses, exposing large patches of short, grayish 

 winter hair. All of the rest of the animal is in summer pelage, 

 fawn-color, becoming cinnamon on the posterior border of the thighs, 

 and on the sides and tail. An old male ( Xo. 20686, U.S.X.M.). 

 killed on San Bernardino River, Sonora. September 5, 1892, shows 

 the short winter coat over the entire body, through the scanty sum- 

 mer hair, which is still retained on all parts of the body, though most 

 of it has been molted hair by hair, but nowhere in masses. An 

 old male ( Xo. 20682, U.S.N.M.), killed on the summit of the San 

 Jose Mountains, Sonora. October 1, 1892, is in short winter coat. 

 with many scattered hairs of the summer coat all over its body. 



Young in first pelage. — The young are usually dropped during July. 

 A male and female, twins, taken early in August, are almost exactly 

 alike. Above russet fawn-color, with two central and several lateral 

 rows of white spots. The central pair — one on each side of the 

 vertebral column — are regular, beginning at the root of the ear as 

 -tripes which change to spots along the neck; on the back these pure 

 white spots are surrounded by scattered black hairs. The lateral 

 white spots are not surrounded by black hairs, and the rows are 

 irregular, being most numerous on the outside of thighs. The red- 

 dish color of the back deepens to bright russet on the upper side of 

 the tail, but fades on the sides, becoming pure fawn-color along the 

 edge of the belly. The belly, inner sides of limbs down to " knee-" 

 and "hock-joint." underside of tail. chin, throat, and inside of ears 

 are white. Tin 1 sides and front of neck, and the chest, are mixed 

 gray, white, and rufous. The outer >ides of limb- are russet fawn- 

 color with some black anteriorly. There is some white spotting 

 around the hoofs, which are plumbeous-black, tipped with horn-color. 

 The top of the head, and convexity of ears are grayish, mixed with 

 dusky brown. Eyelashes jet black. 



30639 — No. 56—07 m — 11' 



