936 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



This clearing up of the identity of Blanford's D. nanus is a 

 very i:iseful result of Col. Hotson's collection, for the name has been 

 used for specimens from a number of different localities. 



D. inches would appear to be the farthest eastward of the species 

 of Bipodill'iis, and the only one which occurs in India prope". 



Allactaga hotsoni, sp. n. 



A very long-eared Jerboa of medium size. 



Size decidedly greater than in A. indica, but not equalling that 

 of the Central Asiatic species. General colour dull greyish buffy, 

 about as in A. indica, or a little darker. Ears enormously long, 

 far longer in proportion than in any other species of the genus, 

 and equalling in actual size those of the largest Jerboas. Usual 

 white hijD-stripe present, below which the outer sides of the hips 

 are pale fawn tending towards buffy, not ochraceus as in unlliamsi. 

 Whole of back of leg black down to the ankles, a marking towards 

 which there is little or no tendency in other species. Tail dull 

 fawn with a subterminal black ring about two inches in length, 

 not preceded by a white one. Terminal white tuft growing on the 

 last 15 mm. of the tail, its hairs about 18 mm. in length. 



Skull rather larger than in A. indica, falling far short of that 

 of A. loilliamsi. Braincase with its broadest point further 

 forward than in the other species, about half-way between the 

 anterior corner of the orbit internal to the lachrymal bone and the 

 back of the skull. Palatal foramina wddely open, especially 

 posteriorly. Bullas very large, larger even than in the much 

 larger A. icilliamd, and approaching those of A. mongolica and 

 rnckbeili. 



Dimensions of the type: — Head and body, 122 ; tail, 220 ; hind- 

 foot 58 ; ear, 41 : Skull : upper length, 29-5 ; condylo-incisive 

 length, 29.5; zygomatic breadth, 21.7; nasals, 11 x 4-6; 

 interorbital breadth, 9; greatest breadth of braincase, 15-7; 

 palatilar length, 16-8 ; palatal foramina, 5-7 x 3 6 ; bullas, breadth 

 at right angles to greatest diameter, 6*5 ; upper molar series, 

 without p*, 5. 



Hah: — Persian Baluchistan. Type from Kant, 20 miles S. W. 

 of Sib. Alt. 3,950' 



y^jje:— Adult $B. M. No. 19, 11, 8, 56. Original number 

 111. Collected 17th July 1916, and presented by Col. J. E. B. 

 Hotson. One specimen only. 



This most distinct species of Jerboa is readily recognisable by 

 its excessively long ears and, in correlation therewith, by its large 

 bullas, which equal those of much larger species. It is in all 



