MAMMALS OBTAINED IN DAKFUR. 259 



This Gerbil, which is found in a moi'e elevated region than 

 T, hutleri, resembles that species in its general colour, but differs 

 by its longer and more bushy tail. 



The determination of the last three specimens in the list is a 

 little doubtful, but they may be provisionally assigned to the 

 present form. 



33. Tatsrillus perluteus, sp. n. 



cT . 417. 2 . 416, 418, 419, 1160, 1161, 1178. Um Kedada, 

 100 miles E. of El Fasher. 2400'. 



$. 444,446, 491, 492, 501, 1069, 1151, 1180. Neighbour- 

 hood of El Fasher. 



$. 1084, 1122, 1123. Tagbo Hills, 95 miles N.E. of 

 El Fasher. 



A smaller species of vivid buffy colour. 



Size decidedly less than in hutleri and clivosus. General colour 

 bright clear buffy, about as in rufits aiad in gracilis angelus, much 

 paler and clearer than in hutleri and clivosus. Upper surface 

 near " warm buff," darkened a little along the median basal area, 

 clearer on the sides. A patch behind eye and another behind ear 

 white. Ears buffy. Hands and feet white; soles brown with 

 well-marked hair-band. Tail pale buffy above, white below, its 

 terminal third with a brown pencil. 



Skull distinctl}^ smaller than that of T. clivosus. 



Dimensions of the type (measured in the flesh) : — 



Head and body 106 mm. ; tail 149 ; hind foot 30 ; ear 18. 



Skull : greatest length 34 ; condylo-incisive length 30 ; nasals 

 13"3; palatine foramina, anterior 5"4, posterior 3*7 ; bulla 10: 

 upper molar series 5. 



Hab. Plains of Darfar, round and to the east of El Fasher. 

 TjqDe from Um Kedada, about 100 miles E. of the capital. 



I^ype. Adult female. B.M. No. 23. 1. 1. 143. Original number 

 1160. Collected March 15, 1922. 



The bright buffy colour of this Gerbil distinguishes it from 

 hutleri and clivosus, while from the equallj^ bright rnfus it differs 

 by its smaller size and the presence of hair-bands on its soles. 



34. Taterillus rufus Wettst. 



Tatera rufa Wettstein, t. c. p. 111. 



6 . 479, 493, 506, 1080, 1169. $ . 507. W. of El Fasher. 

 2 . 1166. Um Kedada, 100 miles E. of El Fasher. 

 $. 1090. JebelMaidob. 2750'. 



Dr. Wettstein has in our opinion laid too much stress on the 

 presence of the hair-band on the sole as diagnostic of the genus 

 Taterillus, while quite ignoring the length of the posterior palatal 

 foramina. It is clear from his excellent photographs that his 

 Tatera rufa has the long foramina characteristic of Taterillus^ 



