64 University of California Publications in Zoology [Vou. 30

Bonaparte gulls were seen on all the small lakes of the region, and
may have been nesting in such places, too, though we had no positive
evidence to this effect. The species apparently left early in August;
none was seen after the first week of this month.

One specimen was collected (no. 44630), a young bird, taken
July 14, molting from the down to first winter plumage, and not yet
able to fly.

Sterna paradisaea Briinnich. Arctic Tern

Seen at Carcross, May 22, on Tagish Lake May 27, and at Atlin
upon our arrival the next day. Nesting in some numbers (ten or
twelve pairs at least) on the islands opposite Atlin, and certainly at
other nearby points also, for the birds were seen constantly along the
shore of Atlin Lake and about some of the smaller lakes. On the
islands mentioned, none of the young survived the onslaughts of the
herring gulls.

The species was last seen August 8. One specimen was collected
(no. 44681), a young bird taken July 14, molting from the down to
first winter plumage.

Mergus americanus Cassin. American Merganser
A single male bird was seen at Carcross on May 24. The species
was not otherwise observed during the summer.

Mergus serrator Linnaeus. Red-breasted Merganser
Apparently rare. An adult male was seen on Atlin Lake, June 6.
Several were seen on Surprise Lake, September 15, and one collected
(no. 44632), a young bird, fully feathered as regards body plumage
but not yet able to fly.

Lophodytes cucullatus (Linnaeus). Hooded Merganser
An adult male, a single bird, seen on a pond near Atlin on June 17,
and watched through binoculars for some time. This is perhaps the
most northwestern point of record for the species. Great Slave Lake,
its northernmost limit in the interior, is but a little farther north
than Atlin.

Anas platyrhynchos Linnaeus. Mallard

Seen at Carcross, May 22. There were probably a few scattered
pairs breeding in the marshes about Atlin, but not many. Only an