5^5 .7 
OlU 
Forest Lepidoptera of Southern Ontario and their Parasites Received 
and Reared at the Ottawa Forest Insect Survey Laboratory from 1937 
to 1948. 
% 
Henri Raizenne 
FOREWORD 
,, .. J heC f nadia n F °rest Insect Survey has been in operation since 1936, A vast amount of information 
on the distribution, fluctuations and bionomics of forest insects has accumulated over the years. The 
highlights have been published regularly in the annual reports of the organization, but, owing to circum¬ 
stances beyond our control, many valuable scientific records have remained buried in the files awaiting 
further study. This material is now in the process of being collated and analysed and will form the basis 
of a series of technical reports to be issued within the next two or three years. 
The Present publication is, so to speak, the forerunner of the more comprehensive and more 
elaborate statements that will follow in due time. It contains so much information immediately useful to 
^ lor ? st entomologists„ ecologists, systematists and parasitologists that, to meet the urgent demand for 
such information, it was decided to prepare an interim edition in advance of the more complete reports 
referred to above, ^ 
dt 
^ pie most casual perusal of this contribution will suffice to show that an enormous amount of 
patient and exacting scrutiny of thousands of records has been involved in the course of compilation„ In 
3 r 118 connection special credit is due to Mr, Ho Raizenne for his excellent, painstaking work in bringing 
, together all the worth-while material on record in the files of the Forest Insect Survey and to the 
: t oilowing specialists of the Unit of Systematic Qitomology who have assisted him with identifications 
and advicer Dr. T,N. Freeman, Dr. E.G. Munroe, and Mr. D. Hardwick (Lepidoptera); Mr. Gi, Walley, 
j Dr. 0, Peck and Mr. W.R. Mason (Hymenoptera); Mr. G.E. Shewell and Mr. A.R. Brooks (Diptera). 
., .. 
Hie field observations which form the basis of this report were made by H.S. Fleming, 
^ R DuBreuil» J.Co Charbonneau, A.S. Danard and A.G. Donaldson, forest insect rangers, and a number 
i of co-operators belonging to the Ontario Department of Lands and Forests and other organizations. 
The insectary work was performed by the staff of the Ottawa forest insect laboratory. 
G.A. Bradley , W.C„ Me Guff in. Geo. Lewis, B Michael, M. Tubman, T.M. Rowe and many others. 
Although considerable care has been taken to eliminate doubtful records, it is fully realized 
that the report is by no means perfect. Perhaps one of its main weaknesses is the use of common names 
for the foodplants. In some cases this may lead to a certain amount of confusion. However, this could 
hardly be avoided since many of the reports submitted by the field staffs were not explicit enough to 
Division of Forest Biology, Science Service, Department of Agriculture, Ottawa, Canada. 
