NO. 7 ANTELOPES FROM BRITISH EAST AFRICA — HELLER 3 



Measurements. — In the flesh: head and body, 580 mm.; tail, 80; 

 hindfoot, 163; ear, 67. Skull: condylo-basal length, 105; zygomatic 

 breadth, 51 ; upper tooth row, 35 ; PM 1 to muzzle, 30; nasals, 43 x 16 ; 

 diameter of orbit, 23 ; length of premaxillge, 35 ; orbit to muzzle, 55. 

 Aged, the premolars greatly worn ; nasals notched for 5 mm. at tips. 



Remarks. — Besides the type, a male topotype is in the collection 

 which is fully mature but with a damaged skull. The horns in this 

 specimen are 2^ inches long and heavily ringed for two-thirds of 

 their length. Horns parallel and extending backward in line with 

 profile of snout. The male specimen is somewhat darker than the 

 female, but the white areas are the same in extent as in the type. This 

 race inhabits the edge of the desert tract or nyikae, living in the dense 

 thickets of acacias, euphorbias, aloes and sanseveria growth. It is 

 the lightest of all the races. Compared to specimens of kirchenpaueri 

 from Kilimanjaro, collected by Dr. Abbott, deserticola is much lighter 

 and less rufous with lighter crown patch and darker pasterns or hoof 

 bands. 



RHYNCHOTRAGUS KIRKI NYIK^, new subspecies 



Nyika Dik-dik 



Type from Ndi, near Voi, British East Africa; adult male, Cat. 

 No. 182228, U. S. National Museum; collected by Edmund Heller, 

 November 1, 191 1 ; original number, 2541. 



Characters. — Resembling Rhynchotragus kirki most closely, but in 

 size decidedly larger, equalling that of R. hindei from which it differs 

 by lighter coloration. 



Coloration. — Dorsal region ochraceous-tawny changing gradually 

 on sides to buff ; whole dorsal region vermiculated by dusky annula- 

 tions of hair ; underparts sharply defined against this vermiculated 

 area by a wide band of light ochraceous-buff succeeded by the pure 

 white of the median ventral area. Legs uniform ochraceous-tawny ; 

 tail buffy-grey vermiculated by dusky; posterior border of thighs 

 clothed by long white hair in sharp contrast to the buffy grey rump 

 and sides. Head with coronal crest ochraceous-tawny vermiculated 

 only in central part by dusky ; snout lighter, cinnamon-buff ; orbital 

 area white with a blackish diagonal streak through the eye to the 

 anteorbital gland; sides of head buffy faintly vermiculated with 

 dusky ; back of ears buffy, inner side white ; chin and lips white, fore 

 throat pure ochraceous-buff; middle throat vermiculated heavily 

 with dusky like nape. 



