Vol. XIV 
faa7 CHADBOURNE ox Individual Dichromatism. a 
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-five specimens of JZegascops 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. 
1The material examined was as follows: 
CAST-OFF FEATHERS FROM MY TWO OWLS. 
First plumage : : : - : 15 feathers. 
Typical gray phase 9 5 
Intermediate : : : : : SOM B6 
During most marked stage of red-brown fe) c 
Specimens from female after death of male 3 gs 
From skin of female ; : : 12 a 
Total : 220 a 
CAST--OFF FEATHERS FROM SKINS OF M. ASIO. 
2 specimens | first plumage, typical gray 0 : : : gt feathers 
I cs co & i ieGl 9 d : : iy 
7 § adult “gray 3 : ; ; DAY ays 
9 ee ss ee intermediate . : : D noe 0 
4 ss i & typical red ; , : : wo) & 
23 specimens 383 feathers 
Typical gray. | Intermediate. | Typical red. Total. 
Red-brown pig- 
m’ntd matter | 206=(95%) 148=(100%) 226=(100%) |580=(98%) 
present 
Red-b i 
nese een ai 13154) 0=(9%) o=(0%)  |13=(2%) 
Total feath 
ay aes 219=(36-+%) | 148=(25%) 226=(38%) 593 
