﻿2 ARKIV FÖR ZOOLOGI. BAND 4. N:0 3. 



Låter discoveries have increased the number of species 

 and subspecies of Dik-dik Antelopes, but the arrangement 

 into two groups has not been broken. On the contrary it 

 has been confirmed to such a degree that O. Neumann 1905 

 (Sitz.-ber. Ges. naturf. Freunde, Berlin, N:o 3) foiind it sui- 

 table to estabhsh a new genus for the second group and 

 crcated for the same the name Rynchoiragus, keeping the 

 name Madoqua for the first group. Madoqua s. str. should 

 then embrace the foUowing species (resp. subspecies): saltiana 

 Bl AiN VILLE, swaynei Thomas, pldllipsi Thomas, hararensis 

 Neumann, erlangeri Neumann and damarensis Gunther. The 

 new genus Rhynchotragus should include kirki Gunther with 

 the subspecies Mndei Thomas, and the nearly allied thomasi 

 Neumann, and further the species cavendishi Thomas, and 

 guentheri Thomas with the subspecies smithi Thomas. 



Already in his first synopsis of the species of Madoqua 

 Thomas subdivided the thcn known members of the present 

 genus Rhynchotragus into two groups according to the size 

 of the nasals. In the first group the tip of nasals is about 

 level with the front edge of the anterior premolar and about 

 33 mm. from the end of the premaxillse. This group com- 

 prised then the species damarensis and kirki. To these have 

 later been added cavendishi and, as a subspecies to kirki, 

 hindei both by Thomas, and thomasi by Neumann. 



In the second group of Rhynchotragus the nasals are still 

 shorter so that they are only about level with the back of 

 the middle premolar and about 42 mm. from the end of the 

 premaxillse. To this group belonged at first only the species 

 guentheri from the plateau of Central Somaliland, but in the 

 year 1900 a subspecies smithi was added from the country 

 S. E. of Lake Stephanie. 



The species which now is to be introduced here must be 

 counted to the latter group. The anterior tip of its nasals 

 are about level with the back of the middle premolar and 

 about 45 mm. from the end of the premaxillse. The last 

 measurement is counted in the median line, if it is counted 

 from the gnathion to the anterior end of the naso-maxillary 

 suture it is 43 mm. In these two characteristics the new 

 species consequently agrees with guentheri and its subspecies 

 hindei, but on the other hand, it differs from both, as well 

 in cranial as in exteriör characters. The new species is re- 



