CHICAGO ACADEMY OP SCIENCES. 
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which are also larger. The eggs were fomul, at the Yukon mouth, June 
14th, 1868. The young of the first year have very little Ijlaek on the 
head. D. 
Abundant, and not at all shy. It is perhaps the easiest of ail birds to 
shoot, for anything, even the hunter's presenee, will attract them withia 
gunshot; and when one is killed or wounded, the whole flock gather 
around, and will hardly be dispersed as long as the body of their fallen 
companion is in view, or until more of their nuinlier have been shot. In 
the month of June and the latter part of May, flocks of them could always 
be seen hovering over some of the small marshes and ponds near the 
Fort; and had I deemed tlie si)ecimens of sufiicient value to excuse the 
slaugliter of these beautiful birds, an almost uidimited immber might 
have been obtained. B. 
18!). Sterna aleutica Baird, n. s. (694a.) White-tailed Tern. Ob- 
tained with the egg at Kadiak by Bischoff. (See Prof. Baird's paper.) 
D. 
190. Hydrochelidon fissipes. {H. plumbea Wils.) (695.) Short- 
tailed Tern. One specimen, with the egg, obtained from an Indian, who 
collected it on the marshes near Fort Yukon, in June. D. 
191. Colymbus torquatus Briin. (698.) Loon. Not uncommon 
on the Yukon, particularly near the sea. It was obtained by M.r. Kenni- 
cott at Fort Yukon. D, 
Common. The skin of this species is used by the Eskimos to a con- 
siderable extent in their dresses, etc., and when prepared by sewing up 
the neck and legs, is commonly used as a bag to contain their working 
tools. ^^ 
192. Colymbus arcticus Lin. (700.) Arctic Diver. Common at 
St. Michael's. 
The skins, or parts of them, particularly the skin of the neck, are in 
favor with the coast tribes south of Norton Sound for ch)thing. The 
touo-h skin, and strongly implanted feathers, make the plumage of the 
divers particularly serviceable. They are obtained while breeding in 
the shallow lagoons where they cannot dive, and are netted by the 
natives in large numbers. I have seen one dress containing over a hun- 
dred loons' throats of this species alone. The eggs were obtained at 
Fort Yukon. ^^ 
193. Colymbus septentvionalis Lin. (VOl.) Red-necked Loon. 
Abundant at St. JNIichael's. I^- 
One specimen was obtained at the rapids on the Yukon River, when 
I returned from Fort Yukon, July, 1867, and it is rather common at St. 
Michael's, and at the Yukon mouth. The remarks in regard to O. 
arcticus apply also to this species. 
