104 ETNAR LÖNNBERG, MAMMALS COLLECTED IN CENTRAL AFRICA. 



in details. The one signed »A. » has the broadest and flattest interorbital region with only 

 little raised orbits. »C. » again has a strongly concave f orehead with much raised orbits, 

 and »B. » is intermediate in these respects. In a similar way »A. » has the nasal region very 

 flat, while »C. » has it strongly convex, especially in its posterior portion. »B. » is inter- 

 mediate in this respect as well, but is rather flat posteriorly. As »A. » and »C. » are both 

 very old it is impossible to explain the differences as due to age, but it must be a result 

 of individual variation. 



The f emale skulls are, of course, as always is the case, smaller than those of the boars, 

 but, as the above measurements prove, they are somewhat larger than the average in 

 Ph. massaicus and still much larger than in Ph. delamerei. Like the skulls of the boars 

 those of the sows display a considerable variation with regard to some dimensions. 



With regard to colour the Warthogs appear all of them to be pretty similar. The 

 present specimens have the long bristles of the dorsal måne black or blackish brown at 

 the base, but with the distal parts bleached gradually through brown to påle y ello wish, 

 about straw colour at the extreme tips. The scattered bristles on the upper side of the 

 head and snout, in the brush above the eyes, on the outside of the ear, upper parts of the 

 body and the shoulders are black (but may fade to brownish by bleaching as is partly 

 the case with the sow of this collection). The whiskers are larger in the f emale than in 

 the male, white in both, as are also the hairs inside the ears. The scattered bristles on 

 the throat, lower flanks and under side are white. The tail tuft is black. The fore-feet 

 to a patch above the callosity of the »knee» thickly beset with black hair. On the hind 

 feet these black hairs extend on the front side about half way up the metatarsus. In the 

 sow even these hairs are bleached to brownish. 



Potamochoerus. 



The material of Bushpigs in Capt. Arrhenius's collection consists of a about semi- 

 adult animal (second molar developed), a quite young pig, and the skull of an adult boar. 

 The first of these Capt. Arrhenius held in captivity some time at Rutshuru. As could 

 be expected it is most nearly allied to the Uganda Bushpig, Potamochoerus intermedius 

 Lönnberg, but differs from the same so much with regard to the general colour of the 

 body that it most probably represents a local race which I venture to liarae: 



Potamochoerus intermedius arrhenii n. subsp. 



The snout and face is chief ly white with scattered black bristles, a black spöt at the 

 warts and a black patch at the base of the whiskers which are mixed white and black. 

 The black band between the eyes of the typical P. intermedius is merely indicated by some 

 black bristles. The whole forehead and crown are white, a little mottled by the black bases 

 of the bristles and some few black ones. The ears are sparsely hairy on the outer side, the 

 inner side is in its terminal portion black, but with whitish upper margin, and part of the 

 tuft white. The dorsal måne is strongly developed, white with black bases to the verv 

 long (about 17 cm.) bristles. The sides of the back are also chief ly white mixed with 



