156 EINAR LONNBERG, MAMMALS COLLECTED BY THE SWEDISH ZOOLOGICAL EXPEDITION ETC. 
larger, and other measurements in proportion. The nasals of Rh. g. smithi 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 my 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 buffish 
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 »dead leaf» 
(Rép. de Couleurs N:o 321.1) 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 Rh. thomasi has not been described by Neumann, and it is thus uncertain whether it 
belongs to this group or to the Rh. kirki 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) Lypexker 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. R. 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. Bercer writes: »Am Baringo See fanden wir dieses merkwirdige Tier 
[Rhynchotragus nasoguttatus Loxns.] sehr haufig in der steinigen Dornbuschsteppe.» — Draxe-Brockman (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 Rh. nasoguttatus should not always be 
provided with such spots it is plainly characterized by its cranial dimensions, colour etc. It may also be 
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. 
’ If Rh. 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 Rh. hindei. 
