THOMAS SAY FOUNDATION 
PUBLICATIONS 
¢ 
THE THomas Say FOUNDATION was organized 
in 1913 by the Entomological Society of Amer- 
ica for the purpose of publishing works of a 
monographie or bibliographic character on the 
insects of North America. 
The volumes published include: 
VOLUME I. Sarcophaga and Allies in North America. 
By J. M. Aldrich, Curator of Diptera, United States 
National Museum. 1916. 301 pages, 16 plates. $3.00, 
postpaid. A complete monograph of an important group 
of flies. It is the recognized authority on this family of 
the order Diptera. 
VouuME II. Plecoptera of North America. By J. G. 
Needham, Cornell University, and P. W. Claassen, Cor- 
nell University. 1925. 397 pages, 29 figures, 50 plates. 
$5.00, postpaid. The only complete monograph of North 
American stone flies by the two American authorities 
on this interesting and little known order. 
VOLUME III. Plecoptera Nymphs of North America. 
By P. W. Claassen, Cornell University. 1931. VI +199 
pages, 4 figures and 35 plates. $4.00, postpaid. A com- 
panion volume of Volume II, this monograph contains 
a very complete series of fine illustrations, including 
one color plate. 
(Orders from outside North America or United 
States Possessions should add fifty cents to the 
prepaid price of each volume as given above.) 
