702 



THE DESCENT OF MAN 



female; wi.en we see tkat the colors are more vivid, that 

 the narrow white Imes on the flank and the broad white 

 bar on the shoulder are more distinct in the male Oreas 

 derby anus than in the female; when we see a similar dif- 

 ference between the sexes of the curiously ornamented 

 Tragelaphus scriptus (Fig. 70), we cannot believe that dif- 



FiQ. 70.— Tragelaphus scriptus, male (from the Knowsley Menagerie). 



ferences of this kind are of any service to either sex m 

 their daily habits of life. It seems a much more probable 

 conclusion that the various marks were first acquired by the 

 males and their colors intensified through sexual selection, 

 and then partially transferred to the females. If this view 

 be admitted, there can be little doubt that the equally sin- 



