INTRODUCTION 
HE WRITER has been occupied nearly a year and a half in the prepara- 
tion of this the second ten year index to The Condor. Following upon 
consultation with the editors of the publications of the Cooper Ornitho- 
logical Club, one hundred ecireular letters asking for suggestions were sent to 
such representative Club members as were thought would be most interested in 
the effectiveness of such an index. From the answers received the present 
plan was evolved and adopted. 
The procedure followed consisted in making up a ecard index, allowing one 
eard for each species, each locality, and each author. The annual indexes to 
The Condor were not used except in checking for errors and omissions. This 
card index was completed almost simultaneously with the appearance of the 
last issue of The Condor for 1918. The whole was then typewritten, checked 
item by item, and submitted to the editors. 
PLAN OF THE INDEX 
1. Authors. Titles of papers and articles reviewed are entered in chrono. 
logical order, a review being indicated by the abbreviation ‘(rev.)’. Where the 
indexed author is the reviewer the reviewed author’s name is placed before the 
title. Where the indexed author himself is reviewed we read ‘rev. of his’. The 
titles of all articles reviewed are inserted under both the author and the re- 
viewer. 
Cards were sent to all authors the full names of whom were not at hand, 
but responses failed to come from many. Dr. T. S. Palmer furnished full 
names for some of these. 
2. Localities. Authors’ names are listed in alphabetical order under each 
locality, whether the article deals with the avifauna of the region exhaustively 
or simply records some one bird. 
3. Subjects. Names of authors are also listed under special subjects such 
as ‘Anatomy’, ‘Taxonomy’, but only where the article deals exclusively with 
the subject. 
4. Species. Species and subspecies are listed each under its respective 
genus. Under each species are listed all localities from which that species is 
recorded, and also, following a dash (—), are given subjects such as ‘nesting’ 
and ‘food’, to which special reference has been made. Usually references un- 
der any of the latter headings may also be found under the locality heading. 
Thus at a glance one may find, for example, to what locality a certain ‘nest- 
ing’ reference pertains. 
