374 Wisconsin Academy of Sciences, Arts, and Letters. 
THE FAUNA OF LAKE MENDOJA; 
A QUALITATIVE AND QUANTITATIVE SURVEY WITH SPECIAL REF¬ 
ERENCE TO THE INSECTS 
Eichard Anthony Muttkowski 
Notes from the Laboratory of the Wisconsin Geological and 
Natural History Survey^ XI. 
Introduction 
The present paper deals with the macroscopic fauna of Lake 
Mendota. In the fall of 1913 Mr. C. Juday for the Wisconsin 
Geological and Natural History Survey proposed the following 
problem to the writer, ‘'A quantitative study of the insect 
fauna of Lake Mendota as a source of fish food.’’ Certain 
phases of the ensuing investigations are incorporated in the 
present paper. 
I am indebted to Professors W. S. Marshall and A. S. Pearse, 
and to Mr. C. Juday for their constant advice, aid, and helpful 
suggestions; I am also beholden to them and to Professors 
W. N. Steil, E. H. Denniston, G. M. Smith, and J. J. Davis for 
faunal and floral determinations, and I take this opportunity 
to extend my sincere appreciation and thanks for many kind¬ 
nesses. 
Apparatus and Methods .—The Wisconsin Geological and Na¬ 
tural History Survey provided the writer with a row boat and 
detachable motor. The motor made it possible to reach even 
the most outlying portions of the lake in less than an hour and 
to work with the greatest dispatch. Dip-nets, aquatic nets of 
various kinds, rake-nets, dredge, sifting pan, bottles, rubber 
boots, tape-line, thermometer, sounding line, and note book 
formed the chief collecting paraphernalia. 
In general, a ‘‘square meter” method was employed in col- 
