792 MR. J. LEWIS BONHOTE ON A SMALL [NoV. 9, 



the above species. My specimens agree very well with those 

 brought back by Mr. Rothschild from the Wadi Natron, but seem 

 to differ slightly from the typical series from Tripoli. In the 

 subsequent working out of this race note should be taken of 

 G. burtoni (F. Cuv. Trans, Zool. Soc. ii. p. 145, 1838), which 

 Lataste has placed as a synonym of G. pygargus. The mateiial 

 at my disposal is at present too scanty to allow of a decided 

 opinion, but I am inclined to the belief that pygargus^ burtoni, 

 and tarahuli will prove to be forms of one and the same species. 



Gerbillus pygargus F. Cuv. 



Gerbillus pygargus F. Cuv. Trans. Zool. Soc. ii. p. 142, pi. 25. 

 figs. 10-14 (1838); de Wint. in Anders., Zool. Egypt, Mamm. 

 p. 256 (1902). 



One specimen brought home from No. 5 Station on the Sudan 

 Railway by Capt. Flower. 



Gerbillus gerbillus (Oliv.). 



IHpus gerbillus Olivier, Bull, des Sc. Phil. Paris, ii. p. 121 

 (1801). 



Ge7-billus gerbillus (Oliv.), de Wint. in Anders. Zool. Egypt, 

 Mamm., p. 252(1902). 



This pretty little Gerbille, which may at once be distinguished 

 by its bright reddish colour, seems to be very common near Cairo. 

 1 have a specimen collected by Capt. Flower in the Sudan which 

 does not differ much from typical Cairo examples. 



DiPODiLLus wATERsi de Wint. 



Dipodillus tvatersi de Wint. Nov. Zool. viii. 4, p. 399, pi. xx. 

 (1901) ; id. in Anders. Zool. Egypt, Mamm. p. 263 (1902). 



Two examples of this species were brought back by Capt. 

 Flower from Atbara, Sudan. 



Dipodillus mackilligini Thos. 



Dipodillus mackilligini Thos. Ann. Mag. N. H. ser. 7, vol. xiv. 

 p. 158 (1904). 



A single specimen of a Gerbille closely resembling this species 

 was brought in from near Cairo. The type locality is on the 

 Sudan frontier many miles to the south, 



Dipodillus taxrim, sp. n. 



While working a tract of country for further specimens of 

 Acomys russatus, we caught two specimens of a small species of 

 Dipodillus which is apparently undescribed. I have pleasure in 

 naming this species after my wife, who has accompanied me on 

 all my excursions and to whose keen eyesight I owe many of my 

 captures. 



Mostly nearly allied to D. henleyi but rather larger and much 

 greyei- in general tone of coloration. 



