MADOQUIN.E 173 



the eye ; tail short, almost rudimentary ; hoofs more or less 

 elongated, with the supporting under surface normal ; minute 

 lateral hoofs present ; heel-tie in the form of a simple fold 

 of skin ; horns of males from half to three-quarters the 

 length of the skull, straight or slightly sinuous, with strong 

 ribs at base. Skull with very long premaxillse, very short 

 nasals, large nasal aperture, considerable preorbital vacuities, 

 and large, shallow lachrymal pits. 



Distribution the same as that of the subfamily. 



The genus may be divided into the two following sub- 

 genera (frequently regarded as genera), viz. : 



A. Last lower molar without hind lobe ; .upper line 



of premaxillse slanting, scarcely curved ; pro- 

 boscis moderately developed Madoqua. 



B. Last lower molar with a hind (third) lobe ; upper 



line of premaxillae S-shaped ; proboscis more 



strongly developed Rhynchotragus. 



1. SUBGENUS MADOQUA. 



Synonymy as above. 



Hind (third) lobe of last lower premolar wanting ; upper 

 line of premaxillse slanting, scarcely curved ; proboscis 

 moderately developed. Frequently the grey colouring of the 

 upper part of the neck dividing the colour of the back from 

 that of the head. 



The distributional area is restricted to Somaliland and 

 Abyssinia. 



The species may be briefly distinguished as follows : 



A. Back and neck yellowish (fulvous) or rufous 



fawn ; flanks scarcely more rufous. 



a. Size larger M. saltiana. 



b. Size smaller. 



a'. Grizzling indistinct M. sioaynei. 



b' . Grizzling distinct and finer M. piacentinii. 



B. Back and neck, or at least neck, grizzled grey ; 



flanks rufous, to a greater or less extent. 

 Size intermediate between saltiana and 

 swaynei. 



a. Flanks rufous M . phillipsi. 



b. Flanks rufous grey M. erlangeri. 



c. Dark grey grizzling extending on to shoulders, 



flanks, and hind-quarters. 



Size a little less than in saltiana M. cordeauxi. 



