160 NEW SPECIES OF RODENTS FROM TEXAS. 



pecimens, however, which may be regarded as intermediate, unless it 

 be those on which Baird founded his G. breviceps. In that species the 

 under parts are nearly white, but the species is distinctly smaller, and 

 has the head colored like the upper surface of the body. 



The second new species, which belongs to the genus Dipodomys, on 

 account of its thick set body and short Legs, may be called 



DIPODOMTS COMPACTUS. (New species.) 



Description. — Hind toes live; form stout; tail and hind legs shorter 

 than in the other species of the genus. Hind foot shorter than the skull, 

 its length less than one-third the length of the head and body; tail 

 vertebrae equaliug the head and body in length. Ears moderate and 

 rounded. 



Upper surfaces pale, pinkish buff, suffused along the back and head 

 with sepia-color. The under surfaces of the body, the entire fore limbs, 

 and the hind limbs, except a limited area on the outside of the thigh, 

 pure white. The oblique, white thigh band, which occurs in all the 

 species, is here distinctly limited anteriorly by the sepia-colored tips of 

 the short hair of the rump, and extends to and embraces the root of 

 the tail. The pure white of the under surfaces extends high up on the 

 sides of the face, broadly encircling the eye and extending between the 

 eye and ear, and behind the ear itself for a distance of about twice 

 the length of the tatter. 



Sides of the tail, and the distal half of its under surface, white; up- 

 per surface, including the terminal pencil, with an irregular band of 

 pale sepia-color. Proximal half of the under surface with a similar, 

 but very pale and indistinct, band. Median line of soles with only a 

 faint tract' of pale sepia-color. Ears sparsely clothed internally and 

 externally with Iongish white hairs, except in a small area on the ex- 

 terior surface of the superior margin, where the hairs are gray. 



Mystacial bristles of two colors, white and sepia; claws white. 



Measurements. (From llie collector's notes, except that for the hind foot.) 



9 

 Measurements. ^trilaf 



' 1888.) ' 



Length of bead and body 



Length of tail ' 



I of ear (from hehind) 

 Length of fore foot | with < 1 1« » 

 Length of hind fool (with . law ». 



Cm. 



in.:. 



1 1 . 45 

 I'. (i5 



" "::.T 



This species differs from all the tonus thus far described in the short- 

 ness of iis tail and hind limbs and in the amount of white on the sides 

 of the head and the hind legs. The pallor of its coloration is doubtless 

 correlated with the aridity of (he region it inhabits, as in the case of 

 Dipodomys deserti and the species of Gcomys just described, but the 

 proportions of its limbs, ears, and tail, and the distribution of its colors, 

 indicate that it is something more than a geographical race. 



