560 On Tioo Jiew Gerhils from Sinai. 



This j^erbil is probably most nearly related to the 1(irg;e 

 Efl^vptian species G. pi/ramidum, but is distinguislied bj its 

 broMiler skull and laro;er bullse. It is decidedly larger than 

 the. Tripoli G. tarahuli. 



Named in honour of its discoverer, the well-known 

 Director of the Giza Zoological Museum. 



Gerbillus bonhotei, sp. n. 



Near G. andersoni, but with larger bullae. 



Size and other essential characters as in andersoni, but, as 

 compared with specimens from the Nile delta, the coloration 

 throughout of the more bright " gerbil-colour " type, the 

 dorsal colour clear light buffy, less brown, and the white, 

 whether of ear-spots, belly, or feet, more vividly white and 

 more extended in area. Soles well covered with hair except 

 on a small spot under the heel. Upper surface of tail buffy. 



Skull very much as in andersoni, but the bullae decidedly 

 and uniformly larger. 



Dimensions of the type : — 



Head and body 97 ram. ; tail 123 ; hind foot 27 ; ear 16. 



Sivull : greatest length 29*8; condylo-incisive length 26; 

 zygomatic breadth 16*6 ; nasals 11*1 ; interorbital breadth 6 ; 

 breadth of brain-case 14'4 ; palatal foramina 5*1 ; bullse 

 (measured as in the previous species) ll'lx6 3; upper 

 molar series 4. 



Hah. Northern Sinai. Type from Kiiabra Abu Guzour, 

 S.E. of El Aiish. One specimen from Wadi Hareidin. 



Type. Adu't female. B.M. no. 19. 5. 7. 5. Original 

 number 887 (8016 of Giza Museum). Collected 25th De- 

 cember, 1918, by Capt. S. S. Flower, and presented by the 

 Giza Zoological Service. Four specimens in all. 



This species is evidently the representative from a more 

 strongly desert area of the G. ander.-onio'i Lower Egypt, and 

 is readily distinguishable by its larger bullae. In its bi ightness 

 of coloration it differs from typical andersoni, but is imitated 

 by S|)eciinens from tiie Wadi Natron, which are also brighter 

 than those from the daik soil of the delta. All the Egy|>tian 

 specimens, liowever, have the sauie comparatively small 

 bullae. 



It is named after Mr. J. L. Bonhote, Capt. Flower's 

 colleague at Giza, who has done so much to forward our 

 knowledge of the small mammals of Egypt. 



