156 EINAB LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 



larger, and other measurements in proportion. The nasals of Rh. g. smiihi are also 

 longer measuring 14,5 mm.' 



The connection between the maxillary and the nasal by a vertical and somewhat 

 thickened process in front of the lacrymale as described above for the Dik-dik from 

 Guaso Nyiri tends to give more stability to the anterior portion of the skull for the 

 support of the movable proboscis. In this respect the Guaso Nyiri race resembles 

 Rh. nasoguttatus from Lake Baringo.^ The shape and size of the premaxillaries and 

 the shape of the anterior nasal opening are, however, different in the two Dik-diks 

 mentioned. In the white-spotted species the anterior nasal opening is nearly parallel- 

 sided so that there is not much difference in its width at the naso-maxillary suture 

 (8,5 mm.) and at the posterior end of the premaxillaries (7 mm.), while in the Guaso 

 Nyiri Dik-dik the upper posterior dimension (11 — 12 mm.) is very considerably larger 

 than the lower anterior (6 — 7 mm.). The premaxillaries are much stouter and more 

 expanded at the anterior end in Rh. nasoguttatus than in ray specimens from Guaso 

 Nyiri. The nasals are also longer in the former. With regard to the colour of the 

 fur there is no trace of white spots neither on the nose and face, nor on the feet 

 of the present specimens. The sides of the body are less suffused with yellowish than 

 in Rh. nasoguttatus, and the hind quarters are almost pure grizzled grey. Even on 

 the back there is a less yellowish tinge in these specimens.^ The general colour of 

 the back and upper sides is comparatively dark, grizzled by yellowish buff to huffish 

 white subterminal rings, and dark brown to black tips to the hairs. The same dark 

 colour is also found below the pale rings but the concealed parts are dark smoky 

 grey. The neck is paler and more coarsely grizzled grey, because the subterminal 

 rings are broader and almost pure white. The lower flanks are paler than the back 

 and of another colour which is a little different in different specimens. The dark 

 tips to the hair are there so thin that they do not influence the colour. The rings 

 are white, and the colour just below the rings is sometimes the palest shade of »dark 

 fawn* (Rep. de Couleurs N:o 307), sometimes more reddish similar to i>dead leaf» 

 (Rep. de Couleurs N:o 321. i) but in other examples more greyish; the concealed parts 

 of the hair are here the palest shade of smoke grey inclining to whitish. 



^ The skull of Bh. thomasi has not been described by Neumann, and it is thus uncertain whether it 

 belongs to this group or to the JRh. JdrJci group as the describing author says. Its colour is different as will 

 be mentioned below. 



^ When writing about this latter Dik-dik in his book: »The Game animals of Africa» (London 1908, 

 p. 194) Ltdekker is doubtful whether the white spots on the nose of this animal form a constant characteristic. 

 I am fortunate with regard to this to quote the Game Warden of Brit. E. Africa Mr. E. B. Woosnam, who told 

 me as an interesting fact that in the Lake Baringo district every Dik-dik shot, proved to have white spots on 

 its nose. Mr. Woosnam did not know then that I had described this animal. — In Sitz.-ber. d. Ges. Naturforsch 

 Freunde, Berlin 1910, p. 351, Dr. A. Beegek writes: »Am Baringo See fanden wir dieses merkwurdige Tier 

 [Bhynchotragus nasoguttatus LOnnb.] sehr hiiufig in der steinigen Dornbuschsteppe.» — Dbake-Beockman (Proc. 

 Zool. Soc. London, 1911, p. 978) has found white spots on the nose »in a large proportion of the Dik-diks in 

 Somaliland», and he believes this not to be constant there. Even if Eh. nasoguttatus should not always be 

 provided with such spots it is plainly characterized by its cranial dimensions, colour etc. It may also he 

 remembered that when it was described and named nothing had been mentioned before about white spots on Dik- 

 diks, and the name was thus fully justified. 



8 If Bh. thomasi should belong to this group it is entirely different in colour as Neumann says about it: 

 »das ganze Fell mehr einfarbig rotgelb aussehend» than Bh. hindei. 



