1909] The 1907 Alexander Alaska Expedition. 201 
summer dress, in marked contrast to the duller colors of their 
companions. 
Arquatella maritima couesi Ridgway. Aleutian Sandpiper. 
In the vicinity of Windfall Harbor, Admiralty Island, from 
May 1 to 16, flocks of this species were frequently seen alone the 
beach. Ten specimens were secured May 1 to 14 (Nos. 181-190). 
These are all in transition from the winter to the summer plu- 
mage, with the latter predominating. This record probably in- 
dicates the winter habitat of this species, as it is not known to 
breed east of the Alaska Peninsula. 
Pisobia bairdii (Coues). Baird Sandpiper. 
A male in full nuptial plumage (No. 129) was secured by 
Dixon, May 12, at Windfall Harbor, Admiralty Island. It was 
in company with six or eight western sandpipers, and was the 
only one of its kind seen. At Mole Harbor Stephens saw two 
sandpipers that appeared to be of this species. 
Pisobia minutilla (Vieillot). Least Sandpiper. 
According to Littlejohn’s notebook, two least sandpipers were 
seen at Windfall Harbor May 4, and four on the 17th. Three 
adults (Nos. 171-173) in worn nuptial plumage were taken at 
Glacier Bay, July 5. These were feeding on sand flats at the 
head of a long, narrow arm of the bay. 
Pelidna alpina sakhalina (Vieillot). Red-backed Sandpiper. 
A female (No. 120) in full summer plumage was taken by 
Littlejohn at Windfall Harbor, Admiralty Island, May 14. It 
was shot from a great flock of different waders, but none others 
of this species were recognized. 
Ereunetes mauri Cabanis. Western Sandpiper. 
Six examples are in the collection from Windfall Harbor, 
Admiralty Island, May 8 and 14 (Nos. 164-169) and two from 
Glacier Bay, July 6 (Nos. 174-175), the latter in worn nuptial 
plumage, the former in fresh nuptial plumage. At both of the 
above-mentioned localities many were seen in flocks. (For reas- 
ons for the adoption of this name see Allen, Awk, XXIIT, Janu- 
ary, 1906, pages 97, 98.) 
