486 



THE DlVma BIRDS — PYGOrODES. 



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northward. On the Pacific side tlie typical form re2:ilaced by the arm (Prybilof Islands, Kadiak, 

 Aleutians, Kamtschatka, etc.). 



a. Lomvia. 



Si>. Char. Adult, breeding -plumarje : Entire upper parts, including iiileum and nape, glossy 

 fuliginous-black, the secondaries narrowly li[)ped witli wliite ; sides and under part of head and 

 neck rich velvety dark snuff-brown, sliading gradually into the black above it. Lower parts con- 

 tinuous white, ending anteriorly, on the juguluni, in an obtuse angle, extending a greater or less 



distance into the dark brown of the fore- 

 neck ; outer Avebs of exterior feathers of the 

 sides and flanks broadly edged with sooty 

 black. Bill uniform deep Idack, the basal 

 half of the maxillary tomium plumbeous, 

 sometimes conspicuously light colored ; iris 

 brown ; legs and feet dusky brown in the 

 dried skin. Winter plumage : Whole throat, 

 foreneck, auricular region, and sides of the 

 occiput wliite, the upper border of the au- 

 riculars crossed by a narrow blackish stripe ; 

 white latero-occipital space and lower part 

 of foreneck, faintly mottled transversely 

 with dusky. Upper ])arts as in the summer 

 plumage. Young: Similar to the winter 

 plumage, but without white on the sides of 

 the occiput. Ihmmj young : Fuliginous- 

 dusky, the lower parts white centrally, 

 shading exteriorly into smoky grayish ; head and neck variegated with irregular pale smoky luill' 

 streaks and filamentous downy tul'ts of the same color. 



Total length, about 18.50 inches; extent, 30.00 to 32.00; wing, 7.45-8 80 (average,^ 8.24); 

 culmen, 1.40-1.50 (1.45); gonys, .75-.!JO (.83); depth of bill, through angle, .52-58 (.55); tarsus, 

 1.40-1.55 (1.45); middle toe, without claw, 1.65-1.75 (1.70). 



h. Arra. 



Sp. Char. Preci.sely similar in colors, in all stages of plumage, to typical lomvia, l)ut decidedly 

 larger in all its measurements, and with the maxillary tomium less distinctly light colored toward 

 the base. 



U. lomvia, summer phimage. 







U. lomria arra. 



Wing, 8.15-9.25 inches (average, 8.71); cnbnen, 1.4.5-1.75 (1.05); gonys, .85-1.00 (.92); dq.tli 

 of Ijill through angle, .55-.6() (.58); tarsus, 1.45-1.60 (1.51); middle toe, without claw, 1.70-l.iK) 

 (1.81). 



Though by many the Briinnieh's Guillemot has been regarded as merely a loeal 

 race of the common species, it has of late become generally regarded as having good 

 claims to be considered a distinct species. It appears to have to a large degree the 

 same distribution as has the truilc, and so far as it has been observed, the same habits. 



' or eiglit adult uxaiiiplL's. 



