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© 
1910] Grinnell.—Birds: Alaska Expedition, 1908. 3 
the belly, and blackening on the fore-neck; the down above is 
black at the base, becoming dull lght ochraceous at the tips; 
the thighs and ecrissum are mottled with whitish; the effect is 
darkest on the hind neck, and thence two solid black stripes 
extend down the middle of the back; the light mottlings are 
rustiest on the wings, flanks, and rump. In general, there is 
a eurious pepper-and-salt effect. The down is abundant and 
covers the entire skin, traces of apteria showing only on the 
sides of the hind neck in front of the wings. 
Figs. 1, 2, 3—Haematopus bachmani, showing changes in outline of 
mandibles with growth; X 1. Fig. 1, no. 1151, natal; fig. 2, no. 1157, half- 
grown juvenal; fig. 3, no, 1155, adult male. 
At Northeast Bay, Hinchinbrook Island, Dixon found an 
oystercatcher’s nest, June 25. It was merely a bed of pebbles 
at the side of a stick of drift-wood on the end of a sand-spit. 
There was a single egg on the point of hatching. This may 
have been the last of the set, the other precocial young having 
probably already left the site and hidden among the stones. 
The old bird showed great solicitude, and kept crouching, pre- 
tending to hide behind rocks, or sneaking along with drooping 
tail and bowed head. 
The species was common at the mouth of Port Nell Juan and 
at Drier Bay, Knight Island. It was noted on Montague Island 
at both Zaikof and Hanning bays. At the former point, July 
5, Dixon observed two half-grown young running about on the 
