492 PROCEEDINGS OF THE NATIONAL MUSEUM vor.. io6 



(BM) ; foothills, southern Jebel Marra, 3 (BM) ; 40 miles west of El 

 Fasher, 1 (BM) ; Diik Fagioil, 1 (BM) ; northeastern Jebel Marra, 1 

 (BM) ; Kurra, northeastern Jebel Marra, 1 (BM) ; Chak Chak, 3 (BM) ; 

 Kulme, Wadi Aribo, 5 (BM); Wadi Kongei, east-central Jebel Marra, 

 3 (BM); Mongalla, 2 (BM); Um Dona, 1 (BM); Agur, 1 (BM); 

 Delami, 1 (BM). 



Measurements: Average and extreme measurements, respectively, 

 of ten males and three females from Torit are as follows: Length 

 of head and body 160.6 (141-175), 147.5 (141-158); length of tail 

 159.6 (145-178), 167.5 (154-174); length of hind foot 37.1 (35-38), 

 37.5 (36-39); length of ear 21 (19-23), 20.5 (19-21); condyloincisive 

 length of skull 35.5 (33.2-37.3), 35.3 (33.1-37.1); greatest length of 

 skull 40.9 (38.2-43.4), 41.1 (38.6-43.1); greatest width across zygo- 

 matic arches 21.0 (20.2-22.2), 20.5 (19.5-21.5); least interorbital 

 width 6.7 (6.4-7.0), 6.6 (6.4-6.8); length of nasals 16.1 (14.2-17.9), 

 16.3 (14.8-17.4); crown length of upper toothrow 6.4 (5.9-6.7), 6.4 

 (6.2-6.7); length of auditory bullae 11.4 (11.0-11.8), 11.3 (11.1-11.7); 

 depth of braincase at level of auditory bullae 15.6 (14.9-16.3), 16.0 

 (15.8-16.4). 



Remarks: There is no detectable difference in the animals from 

 Torit and those obtained from the Jebel Marra. The amount of 

 variation in any given series is quite remarkable, especially as regards 

 color. All specimens, though, show the lack of the tuft on the tail 

 and the cranial characters are all within a normal range of variation 

 for any given series. The amount of variation noted in color may 

 be explained on the basis of seasonal difference. 



Tatera flavipes G. M. Allen 



Tatera jlavipes G. M. Allen, Bull. Mus. Comp. Zool., vol. 58, p. 331, July 1914. 

 (Aradeil)a, above Roseires, Blue Nile.) 



Specimen Examined: The type. 



Measurements: The type specimen, an adult female, measures as 

 follows: Total length 343; length of tail 172; length of hind foot 40.5; 

 length of ear 23; condyloincisive length of skull 40.5; greatest length 

 of skull 44.0; greatest width across zygomatic arches 22.3; least inter- 

 orbital width 7.4; length of nasals 16.9; crown length of upper tooth 

 row 6.6; length of auditory bullae 12.2; depth of braincase at level of 

 auditory bullae 16.9. 



Remarks: The dorsal color of jlavipes is somewhat darker than 

 benvenuta; the dorsal surface of the tail and the ears are darker; the 

 tail is longer; and the hind foot is decidedly longer and wider. The 

 upper cheekteeth are larger labiolingually ; the auditory bullae are 

 larger and more inflated; the rostrum is wider and longer; the upper 



