ALLEN: MAMMALIA. 207 



occurs occasionally in any series of this species from a given locality. One or 

 two of the specimens studied show this same variation. 



LEPUS SECHUENENSIS deWinton and Styan. 



A single male taken at the Ramala Pass, in western Szechwan represents 

 this species. The peculiar grayish blue of the backs of the ears, and of the 

 rump, thighs, and tail have been noted by the describers as markedly character- 

 istic. The ears are strikingly long and the hind feet are stout and heavy. The 

 only measurement given in the original description of this hare is that of the 

 skull length 97 mm. The following are the dimensions of the specimen 

 studied: total length, 533 mm.; tail, 70; hind foot, 120; ear from anterior 

 base in the dried skin, 130. The skull measures: greatest length, 90.5 mm.; 

 basal length, 73; palatal length , 40 ; greatest length of nasals, 36 ; median length 

 of nasals, 28; greatest breadth of nasals, 17; zygomatic breadth, 43; mastoid 

 breadth, 36; greatest breadth outside upper molars, 22.7; length of palatal 

 foramen, 23.5; mandible from condyle to tip of incisors, 72; alveolar length of 

 upper tooth row, 14.7; alveolar length of lower tooth row, 15. 



Notwithstanding that the ears are longer and the skull larger than in the 

 preceding species, the audital bullae are notably smaller. 



OCHOTONIDAE. 



OCHOTONA HODGSONI (Blyth). 



This mouse-hare seems to be somewhat widely distributed in the high 

 mountains of western Hupeh and Szechwan. A series of eleven specimens repre- 

 senting various ages, was collected at the following localities: Fanghsien, 

 9,000 feet; Washan, 8,200 to 11,000 feet; Lianghokow, 13,000 feet; Tachiao, 

 12,000 to 13,000 feet; Shuowlow, 13,000 to 14,000 feet. The series shows 

 more or less variation in color from a general cinnamon to nearly bistre. 

 The under parts vary according to age or season from grayish white to pale buff. 

 The pelage when fully developed is remarkably full and long. Bonhote in his 

 review of the Old World species of this genus, records specimens of hodgsoni 

 from eastern Sikkim, "Gannsu in N. Thibet," and from Szechwan, whence also 

 it has been described by Milne Edwards under the name "tibetanus." The 

 specimen from western Hupeh probably marks the general eastward bounds of 

 its range. 



