22 
LIST OF COLLECTIONS. 
Shallow-water collections with Birge net. 
Qualitative collections with surface net. 
Quantitative collections with plankton apparatus 
Protozoa and Rotifera, collections. 
Vermes, collections. 
Crustacea, collections... 
Arachnida, collections .. 
Insecta (liquid collections). 
Insecta (pinned specimens) . 
Mollusca, collections... 
Fishes, collections*. 
Amphibia, collections. 
Reptilia, collections. 
Food collections. 
232 
502 
999 
543 
490 
167 
235 
2,245 
5,500 
388 
196 
59 
15 
434 
ENTOMOLOGICAL STUDIES. 
It lias been thus far the primary object of the entomological 
studies made by Mr. Hart to make us fully acquainted with 
each species in all its stages as a preliminary to investigations 
along other lines. To this end extensive search has been made 
of all varieties of situation in the waters of the Station field, the 
species at each location being listed at each visit and collections 
being also made. The regular typical localities represented by 
the substations have been further searched at regular intervals 
for two years. About five hundred lists and illustrative collec¬ 
tions have thus been accumulated. The biological observations 
and breeding-cage experiments made during this time are 
recorded on some seven hundred note slips. 
The Hymenoptera and Lepidoptera and a large part of 
the Diptera have been worked up, and reported upon in a 
paper on the entomology of the Illinois River and adjacent 
waters, published as Article VI. of Vol. IV. of the Bulletin of 
the State Laboratory of Natural History. Since this publica¬ 
tion much additional information concerning these groups has 
been acquired. Careful studies have been made on some of 
the smaller Diptera, on the water-beetles, and upon the Neu- 
roptera, Thysanura, and Hydrachnidee. The dragon-fly collec¬ 
tions have been determined by Mr. J. C. Needham, formerly 
Instructor at Knox College, and by Mr. C. C. Adams, an 
assistant in the State Laboratory. 
These entomological collections represent some 850 species 
of insects. Every effort has been made by breeding to 
identify eggs, larvae, and pupae of insects aquatic in any stage. 
* About 2.000 specimens. 
