MAMMALS OF ANGLO-EGYPTIAN SUDAN — SETZER 493 



incisors are more proodont; the zygomatic arches are more angular; 

 and the braincase is deeper and more rounded dorsally. 



The type of fiavipes is a younger animal than any of the specimens 

 with which it was compared. In spite of its youthfulness it is larger 

 than an adult of henvenuta, to which complex it definitely belongs. 

 The tail in flavipec, like in henvenuta and soror, is untufted. This 

 complex is indeed puzzling, and more material is needed to under- 

 stand the problem of the relationships of these species. 



Tatera macropus (Heuglin) 



Figure 5,6 



Meriones macropus Heuglin, Reise in Nordost-Afrika, vol. 2, p. 79, 1877. (Bongo, 

 Bahr-el-Ghazal region.) 



Specimens Examined: Three, all in BM, from: Halfway between 

 Chak Chak and Dem Zubeir, 2; near Chak Chak, 1. 



Measurements: An adult male from near Chak Chak has the 

 following measurements: Length of head and body 180; length of 

 tail 170; length of hind foot 35; length of ear 19; condyloincisive 

 length of skull 32.2; greatest length of skull 38.2; greatest width 

 across zygomatic arches 19.1; least interorbital width 6.6; length of 

 nasals 15.5; crown length of upper toothrow 6.0; length of auditory 

 bullae 10.2; depth of braincase at level of auditory bullae 15.2. 



Remarks: These animals are of a decidedly reddish color and have 

 a pronounced tuft on the distal end of the tail. This brush is much 

 more distinct than that in T. robusta to which macropus is obviously 

 allied and which may eventually prove to be only a subspecies of the 

 former. 



Tatera robusta robusta (Cretzschmar) 



FiGTTRE 5,6 



Meriones robustus Cretzschmar, in Riippell, Atlas zu der Reise im nordlichen 

 Afrika von Riippell, pt. 1, Saugethiere, p. 75, 1826. (Kordofan.) 



Specimens Examined: Thirty -seven, all in BM, from: Jebel Meidob, 

 4; Naikhala, Upper Egypt, 6; 6 miles west of El Fasher, 9; 40 miles 

 west of El Fasher, 3 ; 40 miles west-southwe. t of El Fasher, 3 ; Kordofan, 

 1; 170 miles east of El Fasher, 1 ; 90 miles east of El Fasher, 1 ; Tina 

 Wells, 1 ; 1 15 miles northeast of El Fasher, I; 16 miles east of El Fasher, 

 1 ; En Nahud, 1 ; 55 miles north of El Fasher, 1 ; 52 miles west-southwest 

 of El Fasher, 1 ; El Fasher, 1 ; 5 miles west of El Obeid. 2. 



Measurements: An adult male from Naikhala, Upper Egypt, 

 m^easures as follows: Length of head and body 123; length of tail 170; 

 length of hind foot 33; length of ear 17; condyloincisive length of 

 skull 32.7; greatest length of skull 37.1; greatest width across zygo- 

 matic arches 18.2; least interorbital width 6.5; length of nasals 15.0; 



