FOOLISH GUILLEMOT. 325 



the appearance of the adult in summer, but may still be dis- 

 tinguished by its comparatively slender and light-coloured 

 bill. 



Male in Winter. — When the autumnal moult is com- 

 pleted, a great part of the dark brown of the head and upper 

 neck has been substituted by white, of which colour arc the 

 throat, the lower part of the cheeks, a band behind the eye, 

 the sides of the neck, all the lower parts, and the tips of the 

 secondary quills. The upper part of the head, the space 

 from the bill to the eye, a band under and behind the eye, 

 the hind neck, and all the upper parts of the body blackish- 

 grey ; the primaries and tail-feathers greyish-brown. 



Female in Winter. — There is no external difference by 

 which the female may be distinguished. 



Remarks. — Guillemots in nearly all respects similar to that 

 above described, but having a white ring about the eyes, and 

 a narrow band or line of the same behind them, were generally 

 understood to be of the same species until of late, when they 

 have been separated under the name of Uria lacrymans. 



