52 University of California Publications in Zoology [Vou 30

Acknowledgments are due to the Dominion Parks Branch, Depart-
ment of the Interior, Canada, for permission to collect migratory birds,
and to the Game Conservation Board, Vancouver, for permission to
collect non-migratory birds and for other courtesies.

In working up the collection it proved necessary to borrow speci-
mens from many institutions. The study of the ptarmigans in par-
ticular called for the assemblage of as large series of certain forms
as could be brought together, and appeal was made to all museums
and private collections that seemed likely to have pertinent material.
Generous response to the many requests for the loan of specimens came
from all who were asked, comprising the following: American Museum
of Natural History, New York (including many specimens from the
Sanford collection) ; Carnegie Museum, Pittsburgh; Colorado Museum
of Natural History, Denver; Museum of Comparative Zoology, Cam-
bridge; Museum of History, Science and Art, Los Angeles; Provincial
Museum, Victoria; United States Biological Survey; United States
National Museum; Victoria Memorial Museum, Ottawa; Louis B.
Bishop; Donald R. Dickey; George Willett.

To Major Brooks I am indebted for help extended daily during
the season’s field work, for specimens turned over to me from day to
day, field observations proffered, and for advice and critical comments
pertaining to the systematic treatment of various species. The cordial
assistance extended to us both by individuals resident in Atlin, whose
acquaintance we made there, was a most important factor in making
our work pleasant and profitable. In particular, mention should
be made of Mr. C. L. Monroe, Government agent, for aid in his
official capacity, and, together with Mrs. Monroe, for many unofficial
courtesies; of Mr. A. B. Taylor, Government telegraph operator, a
sportsman and a keen observer, In whose company I made many
pleasant trips, who aided in securing numerous specimens and who,
with Mrs. Taylor, did all he could to make our summer a pleasant
one; and of Mr. H. Maluin, whose cordial welcome to his mining camp
on Otter Creek enabled us to work in that region. On the train,
en route from Skagway, we first made the acquaintance of Inspector
Moorhead, of the Royal Canadian Mounted Police, who, then and
later in the summer, lost no opportunity of extending such courtesies
as lay in his power. To Corporal Robert McCleery and Mrs. McCleery,
in their isolated post on Lake Teslin, the writer is indebted for cordial
hospitality and for aid in securing needed specimens. From Mr. and
Mrs. John Garrett, of Atlin, we received innumerable courtesies.