BIRDS OF NORTH AND MIDDLE AMERICA. 



775 



originating immediately beneath eye and extending downward and 

 backward along upper edge of aiuicular region. Upper parts dull 

 slate-blackish, under parts plain brownish gray. 



Range. — Kodiak Island, Aleutian Islands, and islands of Bering 

 Sea to northern Japan. (Monotypic.) 



^ETHIA CRISTATELLA (Pallas ). 



CRESTED AUKLET. 



Adults in breeding seaso?!.— Upper parts, including recurved frontal 

 crest, plain slate-blackish; forhead and entire under parts plain 

 brownish gray, paler on posterior under parts; narrowly acicular 

 auricular plumes white; bill, including supra-rictal plate, orange-red 

 or reddish orange, the tip more or less whitish or pale horn color; iris 

 white; legs and feet pale violet-gray (in life), the joints darker, webs 

 blackish, and soles black. 



Winter plumage. — Similar in coloration to the breeding plumage, 

 but bill smaller (through shedding of supra-nasal cuirass, supra- 

 rictal plate, and other parts, and duU brownish or horn color instead 

 of reddish orange. 



Young. — Similar to winter adults, but crest and auricular plumes 

 absent or but slightly developed, and bill still smaller. 



Downy young. — Uniform sooty grayish brown, slightly paler below. 



Adult rnaZe.— Wing, 125-143 (134.8); tail, 33-38 (35.7); exposed 

 culmen, 10-12 (11.2); greatest depth of bill, 10-12 (11.1); tarsus, 

 24-28 (26.4); middle toe, 29..5-35.5 (33.1). « 



Adult female.— Wmg, 131-137 (134); tail, 31-39 (34.5); exposed 

 culmen, 10.5-11.5 (10.9) ; greatest depth of bill, 9.5-12 (10.5); tarsus, 

 25-27 (25.8); middle toe, 30-34 (32.2). & 



Coasts and islands of Bering Sea and immediately ^^ontiguous por- 

 tions of Arctic and northern Pacific Oceans, from Wrangol, Herald, 

 and Diomede Islands and eastern coast of Siberia (Emma Harbor; 

 Plover Bay), etc., to Kodiak Island and northern Japan; breed- 



« Ten specimens. 



& Seven specimens. 



