Vol. XIVT 

 1897 J 



Chadboi'RNE on Individual Dichromatism. 



37 



during the progress of the change to the reddish phase, for mark- 

 ings were absent, not merely hidden by overlying color, which 

 had been distinct in corresponding specimens of the gray phase. 



Feathers from twenty-tive specimens of Megascops asio ^ in the 

 writer's collection, in all stages of plumage, were indistinguish- 

 able from those of the dichromatic female in corresponding dress, 

 both the black and also the various shades of brownish pig- 

 mented matter being present in the large majority of specimens 

 examined; but differing in relative amount and distribution. 



' The material examined was as follows : 



Cast-off Feathers from my two Owls. 



First plumage . . . - . 15 feathers. 



Typical gray phase .... 9 



Intermediate ..... 56 



During most marked stage of red-brown 10 

 Specimens from female after death of male 3 



From skin of female . . . 127 



Total . 220 



Cast-off Feathers from Skins of M. asio. 



