260 MESSRS. OLDFIELD THOMAS AND M. A. C. HINTON ON 



while, as Thomas has shown, Taterillus is often without the 

 hair-band. 



In this species the sole is whitish and generally completely- 

 naked, the ears are unusually large, and the general colour is 

 particularly bright and vivid. 



T. gyas Thos., from the Binder River, is related to T. rufus, 

 but is larger. 



" Soles of feet white."— W. P. L. 



35. Taterillus butlbri Wrought, 



5. 1200, 1202, 1206. $ . 404, 404*, 1199, 1201. El Obeid 

 and neighbourhood. 



$ . 409, 1189. Near Nahud, Kordofan. 



A rather dark form with comparatively short tail, 



36. Gbrbillus pygargus F. Cuv. 



cJ. 1091. $.1092,1104. Jebel Maidob. 2750'. 

 o . 1083. El Fasher. 



37. Gerbillus agag Thos. 



$ . 406, 408. Nahud, Kordofan. 



5 . 413, 414, 415. 100 miles W. of Nahud. 



§ . 423. 65 miles E. of Nahud. 



6. 445, 476, 1060, 1129, 1148. $ . 451, 474, 475, 476, 486, 

 487. 503, 1079, 1081, 1085, 1126, 1130, 1132, 1133, 1136, 1137, 

 1146, 1156, 1157. El Fasher and neighbourhood. 



§ . 1168. Um Kedada, Darfur. 



Hitherto only known from the type, a male obtained in 

 November 1902, at Agageh Wells, by Oapt. Dunn. 



38. Gerbillus nancillus, sp. n. 



$ . 425. 16 miles E. of El Fasher. 

 5 . 1078. 45 miles N. of El Fasher. 



A minute species smaller than any hitherto known. 



Size even less than in BipodiUus henleyi. General coloui" 

 above very pale gerbil-colour ; only a narrow dorsal area with the 

 usual dark bases to the hairs, those of the flanks with white 

 bases and bufFy tips. Under surface snowy-white, the white area 

 taking in the whole of the fore limbs. Middle of face buify ; 

 cheeks, a ring round the e3^es, patch at base of ears, and another 

 behind them white. Ears small, their j)i'oectote contrasted 

 brown, with the tip whitish, their metectote buffy. Soles of 

 hind feet partly naked behind, but with the hairy terminal part 

 of metatarsus characteristic of Gerbillus. Tail practically white, 

 the upper surface very slightly more bufiy, the end lightly 

 pencilled Avith brown. 



