fi sy ey 
34 ILLINOIS ACADEMY OF SCIENCE 
and the other by J. R. Malloch, on the immature stages of 
Diptera. Another paper, mainly ecological, published within 
the year is a general survey of the May-beetles of Illinois, 
based on a collection of nearly 115,000 specimens, obtained 
during six years’ field work in forty-two Illinois counties. I 
should perhaps include in this list a study of the chinch-bug 
outbreak of 1910-1915, printed this year, in which an effort 
is made to correlate the origin of this uprising, and the course 
of its events, with peculiarities of weather, soil, crops, and 
other ecological influences. Especially elaborate studies have 
also been made on the life history of the codling moth as 
related to conditions of temperature, humidity, movements of 
the air, etc., and a first paper on this subject was printed in 
the last report of the State Entomologist of Illinois. Indeed, 
the time has now come when all serious studies of economic 
problems in entomology must include a careful mustering and 
analysis of ecological factors, the practical importance of 
which is now commonly acknowledged by students of applied 
entomology. 
Respectfully submitted, 
STEPHEN A. ForseEs, Chairman. 
