494 



THE DTVIXO mr.DS — PYGOPODES. 



Four eggs, selected by l)v. J5ry;int as cliaraeteristic of their general size and shape, 

 measure 2.24 by 1.42 inches; 2.16 by 1.50; 2.01 by 1.4G; 2.28 by 1.51. 



The Smithsonian Institution has eggs of this species from the Bay of Fundy, Gulf 

 of St. Lawrence, and Newfoundland. In some the ground-color is a glaucous-white ; 

 in others a deep buff; the markings are of a rich brown intensified into blackness. 

 Their average size is 2.30 by 1.8.") inches. 



Cepphus columba. 



THE PIGEON GUILLEMOT. 



Uria (jryUc, fi, L.VTii. hid. Oni. 11. 17S»0, 7!>7. 



Cepphus columba, Pali,. Zoog. Kosso-As. II. 1826, 348 (iiart). 



Uria columba, Kkys. & I'.L.va. Wirb. Eur. 1840, p. .\cii. — Cass. U. S. Expl. Exj.. Oni. 1858, 34tJ, pi. 



38, fig. 1 ; in Baird'.s 15. N. Am. 1858, 912 ; ed. ISdO, pi. '.i(i, lig. 1. — Bauld, Cat. N. Am. B. 



18,59, no. 727. — CouEs, Key, 1872, 345; Check List, 1873, no. 032; 2d lmI 1882, no. 872.— 



BiDcw. Nom. N. .\m. P.. 1881, no. 761. 



Hab. Coasts and islands of tlie North Pacific, from Southern California (breeding) to Aleutian 

 Islands, and across to KanUscliatka; thence southward to Northern Japan. Wholly replaced north 

 of Behring's Straits by C. Mandtii. 



C. columba, summer dress. 



Sp. Char. Similar to C. grylle, but the bill stouter and more obtuse at the tip, the under 

 surface of the wings without any distinct white, and witli tl;e white patch on outer surface of the 



^'^^ 



iSnmincr udidt. 



Downy young. 



wings divided for the lower half by a black V-sliapcd bar. Adult, in summer : Uniform sooty 

 slate-black, slightly glossed with " invisible " greeu ; wing with two white patches, one covering 



