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U.S. NATIONAL MUSEUM BULLETIN 275 



Figure 26. — Distribution of the subspecies of Gerbillus campestris. 



Remarks. Setzer (1957) referred all specimens of this gerbil from 

 Libya to Gerbillus campestris dodsoni. Gerbillus campestris patrizii 

 from Cufra Oasis was placed in synonymy under G. c. dodsoni, and 

 specimens from the Cyrenaican Plateau were likewise included with 

 this subspecies. In a later paper, Setzer (1958) described G. c. wassifi 

 (p. 208) from the Egyptian littoral and G. c. haymani (p. 209) from 

 Siwa Oasis of western Egypt. Both of these type localities are located 

 near the Libyan frontier. Currently, many more localities in Libya are 

 represented by specimens, and the taxonomic relationships can be 

 investigated more thoroughly. Gerbils from the coastal plain of 

 northern Cyrenaica are referable to G. c. wassifi, and those from Bahr 

 el Tubat, near Giarabub, represent G. c. haymani. The specimens 

 from the Cyrenaican Plateau, formerly referred to G. c. dodsoni by 

 Setzer, have been supplemented with additional series from the nearby 

 coastal plain and are here recognized as a new subspecies, G. c. brun- 

 nescens, distinct from dodsoni. Furthermore, G. c. patrizii has been re- 

 instated as a subspecies based upon the critical examination of newly 

 acquired specimens from El Hauuari and El Giof of Cufra Oasis. The 

 range of G. c. dodsoni is extended to include all of Tripolitania, most 



