622 



Juv. prsecedenti similis sed coloribus sordidioribus, maculis in corpore supra indistinctioribus et gula cum 

 capitis lateribus griseo-fumoso notatis. 



Adult Male (Greenland) . Fore part of the crown deep blue-grey streaked with black j hind crown and 

 entire hind neck and fore part of the back black, the feathers margined with white, giving a regular 

 streaked appearance ; on the lower neck these markings are continued so as nearly to meet on the fore 

 part of the neck ; entire upper parts brownish black faintly glossed, more or less spotted with small 

 oval white spots ; quills blackish brown, lighter on the inner webs ; tail blackish brown, slightly tipped 

 with dirty white ; sides of the head, neck, and the throat clear blue-grey ; on the throat is a large 

 triangular rusty red patch ; rest of the uuderparts white, except the flanks, which are coloured like the 

 back ; bill black ; iris dark brown ; legs blackish brown with a greenish tinge on the outside, and 

 inside aloug the toes and the centre of the webs dull yellowish fleshy. Total length about 23 inches, 

 culmen 2-5, gape 2*75, wing 11*0, tail 2 - l, tarsus 2'75. 



Adult in winter. Resembles the young, but has the crown and hind neck more distinctly marked with 

 white ; the throat and sides of the face pure white, the general coloration is purer and clearer ; and the 

 bill is dark blackish lead, becoming black at the tip. 



Young (Hants, December 1870). Crown and hind neck dark ashy grey, narrowly streaked with white; 

 upper parts as in the adult, but much more profusely spotted, the spots being larger and more lengthened ; 

 underparts white ; throat and sides of the head marked with dull blackish grey ; bill dull bluish white 

 with dusky ridge ; legs lighter than in the adult. 



Young in down. Upper parts blackish brown, darkest on the back ; underparts lighter, and almost grey in 



tinge of colour. 



i 



Obs. In a series of specimens I find a considerable individual variation in size, not dependent on sex. The 

 variation in those in my collection is as follows — gape 2 - 75-33 inches, wing 10-3-11-3, tail 2-0-2-1, 

 tarsus 2-7-3-0. 



The range of the present species of Diver is very extensive ; for during the summer season it 

 inhabits the northern portions of Europe, Asia, and America, being very generally distributed, 

 and in the winter it migrates southward to North Africa and China in the Palsearctic Region, 

 and to Maryland in the Nearctic Region. 



In Great Britain it is tolerably common at all seasons, breeding in the northern districts, 

 and occurring in the south of England in winter. Mr. Cecil Smith informs me that it visits 

 Guernsey in winter, but is not numerous ; but on the south coast of Devonshire it is very common 

 from the autumn to the spring, and occasionally some remain till they have assumed their full 

 breeding-plumage. In Somersetshire, he adds, it is only an occasional and accidental visitant, 

 but sometimes is found inland as well as on the coast, especially daring the season of passage. 

 Mr. Mansel-Pleydell says that it does not visit the coast of Dorsetshire regularly, and that adults 

 of the present species are more frequently obtained at Weymouth than are the Great Northern 

 or Black-throated Divers in that stage of plumage. On the east coast of England it is most 

 numerous in winter ; but Mr. Cordeaux remarks that it never entirely leaves the shores of 

 Yorkshire, for he has met with them out at sea in every month of the year. Mr. J. H. Gurney 

 informs me that the present species " is sufficiently common on the coast of Durham to be 

 generally found when sought for, and there, as elsewhere, it is not driven away by the severity 

 of the season in the winter. It is believed that a few may be found in almost any month of the 



