290 
TRANSACTIONS OF THE 
Eggs, generally two in number, are laid in a hillock of grass, with a little 
dry grass, and sonielinics a few feathers. D. 
100. Aegialitis semipalinatus Cab. (507.) Semipalniate Plover. 
Very common at Nulato, St. Michael's, and the mouth of the Yukon. 
Eggs are laid in a small depression in the grass, made very smooth and 
round, and lined with a little dry grass, very carefully put in. There are 
generally only two eggs, and they often differ a good deal, even in the 
same nest. This bird is not very shy, and is fond of running about just 
within reach of the small wavelets, probably to obtain any food that may 
be washed ashore. 
Eight specimens were obtained at Sitka by Bischoff. D. 
101. Sqiiatarola helvetica Cuv. (510.) Black -bellied Plover. 
Three specimens were sent from Sitka by BischoflF. Not rare on the 
Yukon, and not very common. Arrives about the first of June near 
Nulato ; but the eggs were not observed, though it doubtless breeds in 
the vicinity. D. 
102. Ajyhriza virgata Gray. (511.) Surf Bird. Four specimens 
were sent from Sitka by Bischoff. D. 
103. Haematoptis niger Pall. (513.) Bachraan's Oyster Catcher. 
Obtained by Bischoff at Silka, and also at Kadiak abundantly. D. 
104. Strepsilas interpres 111. (515.) Turnstone. Not common at 
the Yukon mouth. D. 
105. Strepsilas tnelanocephala Vig. (516.) Black Turnstone. 
Common at St. Michael's. B. 
Rare at Nulato. Arrived May 23rd, 1868; was not observed in 1867. 
Common toward the sea, on the river, below Nulato. Lays two dark- 
colored eggs, in a small excavation, usually on the beach, near the water. 
Common at the Yukon mouth. Many were obtained at Sitka by Bischoff. 
D. 
106. Lohipes hyperboreits Temm. (520.) This beautiful little bird is 
very common all along the Yukon, and is found plentifully at the mouth 
of that river. I have observed it running among stranded blocks of ice 
on the muddy beach at Nulato, sto])ping and glancing around every few 
steps; the pure white of the breast more conspicuous by the black mud 
over wliich it passed. It differs from most birds, in that the female is 
brighter colored than the male. Two eggs in a small round nest, lined 
with dry grass, were found at Pastolik. It is usually gregarious. D. 
This species was quite abundant on some of the small fresh-water 
ponds; and probably nests in some of the sedgy places in these localities, 
though I failed to find their breeding-places. Eggs of this species were, 
however, brought from the vicinity of Unalaklik by Mr. K. D. Cottei-. 
B. 
