564 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loe 



Order HYRACOIDEA 

 Family Procaviidae 



Heterohyrax brucei hoogstraali, new subspecies 



Type: CNHM No. 66868, adult female, skin and skull, from Imui-ok, 

 Torit District, Equatoria Province, Anglo-Egyptian Sudan. Obtained 

 Feb. 1, 1950, by Harry Hoogstraal, original No. 5109. 



Specimens Examined: Fifteen, from: Logu-e, 1 ; Imm-ok, 6; Imatong 

 Mountains, 2; Sunnat, 2; Torit, 1; Nimule, 3. 



Diagnosis: Pure color on hau's of upperparts near AveUaneous. 

 Individual hairs banded plumbeous basally. Cinnamon Drab (which 

 does not show externally), black, AveUaneous, and finely tipped with 

 black, thus presenting a "salt and pepper" or "agouti" pattern. 

 Dorsal color shading gradually over sides into the grayish white of 

 the belly. White hairs on throat, midpectoral region, and inguinal 

 region white to base. Top of head darker than rest of dorsal color. 

 Dorsal spot whitish, large, and bordered b}'- darker color than rest of 

 dorsal coloration. Skull robust, upper cheekteeth light in build, 

 auditory bullae small, rostrum narrow, nasals short. 



Measurements of the Type Specimen: Length of head and body 

 452; length of hind foot 69; length of ear 35; condyloincisive length 

 of skull 83.2; crown length of upper toothi-ow 30.9; least postorbital 

 width 24.5; least interorbital width 47.5; length of nasals 20.4. 



Comparisons: From H. b. kempi, H. b. hoogstraali differs in some- 

 what darkei" color, smaller skull, shorter upper toothrow, and a 

 markedly narrower rostrum. 



H. b. hoogstraali differs from the type of H. b. bakeri in darker dorsal 

 color, dorsal spot whiter, rostrum narrower, upper cheekteeth smaller, 

 and upper toothrow somewhat shorter. 



No specimens or measurements of H. b. thomasi have been available, 

 but from the original description it seems that H. b. hoogstraali is 

 darker and possibly larger. 



Remarks: Hollister (1924, p. 142) listed the specimens from Nimule 

 as Heterohyrax brucei bakeri. However, when compared with the 

 specimens from the Torit area and with the type of bakeri, there can 

 be no question as to their affinity. 



The Nimule specimens differ from bakeri in exactly the same degree 

 as the Torit material. There is no evidence of intergradation in any 

 of the specimens examined. 



