GERBILLUS. 47 



Key of the Indian species, 

 a. Larger, head and body 5 to 7 inches in length. 



b. With large ears ; tail dark banded above and below ; above 

 rufous brown, below white; feet naked below; outer wall 

 of the antorbital foramen rounded and projecting in frotit ; 

 bullce moderate G. indicus, p. 47. 



b? Ears moderate; tall dark banded above, light below; feet 

 thickly haired anteriorly ; outer wall of antorbital foramen 

 perpendicular ; bullae much inflated. 



G. erythrurus, p. 49. 



b? Ears very small ; tail concolorous with the body, with a 

 dusky terminal pencil; above sandy yellow, below lighter, 

 but not white ; feet anteriorly haired, posteriorly naked ; 

 bullae moderate. . . . G. hurrianae, p. 50. 



0.2 Smaller, head and body 3 to 4 inches in length. 



c. Tail without hair, more than i| times head and body. 



d. Proximal half of the sole naked ; six dinctinct planta 

 pads. . . . . . G. nanus, p. 51. 



d?' Sole hairy throughout ; no distinct pads. 



G. gleadowi, p. 52. 



c? Tail without hair, shorter than the head and body. 



G. swinhoei, p. 52. 



Gerbillus indicus. 



Dipus indicus, Hardwicke Linn. Trans., viii, p. 279, pi. vii (1804). 

 Gerbillus indicus, Desmarest N. Diet. d'Hist. Nat., xiii, p. 109 (1817); 



Elliot Madras Journ, x, p. 211 ; F. Cuvier Trans. Zool. Soc, ii, p. 143, pi. 



XXV, figs. 15-19; Hutton and Blytk J. A. S. B., xv, p. 137; id. J. A. S. B., 



XX, p. 167 ; id. y. A. S, B., xxi, p. 350 ; Horsfield Cat. Mamm. E. I, Mus., p. 



150 ; Ke/aart Prodr. Faun. Zeylan., p. 6g; Blytk y^. A. S.B., xxxii, p. 327; 



Adams P. Z. S., 1858, p. 520 ; Blytk Cat,, no. 353, p. i lo ; Jerdon Mamm. 



p. 185; Blanford Persia, p. Q^- 

 Gerbillus cuvieri, Waterhouse P. Z. S., p. 56(1838); Hutton and Blyth 



y. A. S. B., XV, p. 139. 

 Gerbillus hardwickii, Gray List Mamm. B, M., p. 132 (1843). 



Distribution. — Found throughout India from the Himalayas 

 southward, including Ceylon, in sandy and dry places ; extending 

 eastwards as far as Lower Bengal only and westwards to Baluchistan 

 (Blanford). 



The southern form is distinguishable as a well marked geogra- 

 phical race, which was described by Waterhouse in 1838 as 

 G, cuvieri; it is distinguished from G. indicus by its longer tail, 



