196 University of California Publications in Zoology. \Vou.9 
Harelda hyemalis (Linnaeus). Old-squaw. 
‘“At Windfall Harbor, April 17 to May 19,’’ according to 
Dixon, ‘‘this was one of the most numerous and noisy ducks 
in the harbor. They were mating when we came, and the court- 
ing lasted during our stay. On one occasion six males were 
seen flying about after one female. They were all intonating 
‘auck-quan-dee’ to their utmost capacity and the one that hol- 
lowed the loudest seemed to stand the best chance, so there was 
considerable competition. There seemed always to be about three 
males to one female.’’ 
the middle of May. At Mole Harbor between May 19 and June 
10, a few were seen, according to Stephens. And at Glacier Bay, 
The old-squaws began to disappear by 
June 27 to July 20, the species was not uncommon. ‘Two speci- 
mens were preserved, a male (No, 112) and a female (No. 111), 
both taken at Windfall Harbor, May 16. 
Histrionicus histrionicus (Linnaeus). Harlequin Duck. 
This handsome duck proved to oceur in small numbers nearly 
everywhere that observations were carried on. Five adult males 
and five adult female specimens (Nos. 101-104, 72-74, 49, 92, 93) 
were obtained from Admiralty, Baranof, and Chichagof islands 
and Glacier Bay. Many of those seen, as on Glacier Bay, stayed 
in small flocks around the outer reefs, and were thought to have 
been non-breeders, as those taken showed no signs of active re- 
production. No nests or young were found anywhere. Yet the 
presence of harlequin ducks in pairs along streams and on in- 
land lakes all through the summer indicates the probability of 
their nesting. At Hasselbore Lake, Admiralty Island, in June, 
Dixon noted ‘‘three males in persistent pursuit of one female; 
there did not seem to be females enough to go around.’’ At 
Idaho Inlet a harlequin shot by Stephens July 21 showed that 
it had been feeding on isopod crustaceans apparently gathered 
under stones along the beach at high tide. 
Somateria v-nigra Gray. Pacific Hider. 
A single example was secured by the expedition, an adult 
female (No. 21), found dead by Littlejohn at Glacier Bay, July 
