Vol. XV, pp. 117-120 June 2, 1902 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



SEVEN NEW MAMMALS FROM WESTERN TEXAS. 



BY VERNON BAILEY. 



In working out the distribution of the various species of 

 mammals inhabiting the state of Texas, I find the following 

 forms that need subspecific recognition. Two of the genera, 

 Eutamias and Microtus were not previously known to occur 

 within the state. The muskrat, while described from southern 

 New Mexico, occurs also along the lower Pecos and Rio Grande. 



Eutamias cinereicollis canipes subsp. nov. 



Type from Guadalupe Mts., Texas. Altitude 7,000 feet in Transition 

 Zone. No. 109,229, U. S. National Museum, Biological Survey Collec- 

 tion, 9 ad. Collected August 24, 1901, by Vernon Bailey. Original No. 

 7827. 



General characters. — Similar to cinereicollis in fresh postbreeding pelage, 

 but grayer throughout, with paler and duller ochraceous on sides; tips 

 of the long hairs on rump and upper surface of tail white instead of 

 yellowish; feet clear gray without a tinge of yellowish; black dorsal 

 stripe reaching forward to between the ears. 



Measurements.— Ty^Q: total length 230; tail vertebrfe 104; hind foot 

 35. Skull ot %y\)<i: basal length 30; nasals 11; zygomatic breadth 19.3; 

 mastoid breadth 15.8; alveolar length of upper molar series 5.8. 



Remarks. — The present form needs no comparison with its nearest 

 neighbor, the little light colored gracilis. 



24— BiOL. See. Wash. Vol. XV, 1902. (117) 



