3 
the presence and abundance of those organisms upon which the 
oung whitefish depend for their earliest food, and to obtain material 
or a further study of this subject. An assistant was also sent to 
Iroquois county in this month, to examine the eastern part of the 
State with reference to future aquatic work in that region. In April, 
Mr. F. M. Webster, an entomological assistant in the Laboratory, 
collected insects in the counties of Union and Jackson, in Southern 
Illinois, returning early in May. During the latter month. Mr. N. 
~K. McCormick and myself went to the eastern part of Lake county 
for a continuance of the work of the preceding season upon the 
lakes. We used the dredge, towing net and sounding line in Sand, 
Miltimore, Deep and Cedar Lakes, and also made some small col- 
lections of fishes, returning about the middle of the month. 
Later, additional collections of birds and predaceous insects were 
made in Tazewell county, to obtain material for a further study of 
the relations of these groups to canker worms. In June, advantage 
was taken of the meeting of the State Natural History Society to 
use the dredge in the Mississippi river, at Alton, and to collect in- 
sects between that place and Grafton. 
Karly in July, having been appointed State Entomologist, I started 
upon an extended trip through Northern‘ Lllinois, to investigate the 
injuries done by insects to the growing crops, with a view to select- 
ing subjects for.a more detailed study by myself and assistants, later 
in the season. On this trip I went from Champaign to Chicago and 
Waukegan, thence to Freeport, and southwards to La Salle; making 
observations and collections at these and many intermediate points. 
August 15, Mr. McCormick was established on the Illinois river, to 
obtain additional material for the study of the food for fishes, and 
for the purpose of procuring specimens for distribution to the public 
schools. He stayed here during the remainder of the month, and 
returned, also, late in September, for a week’s additional work. On 
the sixteenth of August I made a visit to Stark and Putnam coun- 
ties, and carefully studied the corn-root worm and its injuries to 
corn in that vicinity. The latter half of August was spent by Mr. 
Webster in La Salle and DeKalb counties, where he was sent on a 
similar errand, and instructed to make general collections in en- 
tomology. Early in September, Mr. McCormick and myself visited 
the lower Illinois river, making exhaustive collections of fishes and 
other aquatic animals from the river itself and its tributaries and 
from the lakes in the river bottoms. Late in this month Mr. McCor- 
‘mick was sent to Fox river, in Kendall county, for additional material 
from that stream and its branches. Mr. W. H. Garman spent the 
greater part of September in Southern [llinois, from Centralia to 
Villa Ridge, carefully studying insect injuries to the strawberry. He 
also made large collections of fishes and insects from the region 
visited. The latter days of September and the first week in October 
were spent by him in the Wabash valley, near Carmi, chiefly in 
ichthyological work. Upon his return I went with him to Cedar 
Lake, in Northern Illinois, for the study of the plant and animal 
‘life of that lake, selected as a type of the lakes of Northern Illinois. 
Soundings were made in every direction, in this and in Deep Lake, 
‘adjoining. Temperatures of the water, at the surface and bottom, 
Were taken, by means of a deep-sea thermometer, and everything 
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