Auk 
Jan 
42 NELSON, WVew Birds from Mexico and Guatemala. 
Leach for a genus of hymenopterous insects of the family Tenth- 
ridinida, and subsequently (1856) used by Dr. Giebel for a genus 
of neuropterous insects. While I am pleased to be able to compli- 
ment him upon the discovery that this entomological word ‘has no 
connection with the original Zadza,” he is mistaken in saying that 
Abia and Habia are not the same word in ornithology; for Adza is 
simply a variant of /aéza, introduced by Agassiz upon a mistaken 
notion of the etymology and correct form of Azara’s name /adza. 
If Dr. Stejneger will look in the Index of Gray’s ‘ Handlist’, he will 
find both forms in ornithology. The literal identity of 4éza Leach 
and Ada Agassiz is simply fortuitous; the former is of Greek 
origin ; the latterisnot. I stated the matter correctly, some years 
ago, in the ‘Century Dictionary’: see under the words Ada, 
flabia, and Zamelodia. 
PRELIMINARY DESCRIPTIONS OF NEW BIRDS FROM 
MEXICO AND GUATEMALA IN THE COLLEC- 
TION OF THE UNITED STADES DEPARA- 
MENT OF AGRICULTURE. 
BY E. W. NELSON. 
THE present paper is based upon specimens of Mexican and 
Guatemalan birds obtained mainly by myself and my assistant, 
Mr. E. A. Goldman, during explorations conducted for the Bio- 
logical Survey of the U. S. Department of Agriculture during 
the last five years. In addition to this collection, numbering 
between four and five thousand specimens, I have had free access 
to the National Museum series of Tropical American birds for 
purposes of comparison. In the course of our work we have 
traversed Mexico from one end to the other, and have crossed the 
country six times from sea to sea. Specimens were obtained in 
many districts never before visited by an ornithologist, and 
although the collections were not exhaustive in any given place, 
yet the aggregate of series from numerous localities scattered 
over a large part of the country has afforded a great amount of 
interesting material. 
