The Food Relations of the Carabidee and Coccinellida’. 
37 
collections from the orchard infested by canker-worms, and the 
corn-fields at Jacksonville and Normal overrun by chinch-bugs, 
were made by myself. 
In the following discussion, each genus is taken up separately, 
and the details of its food are given both under general circum- 
stances, as shown by specimens from miscellaneous situations, and 
also under the various peculiar conditions illustrated by the 
special collections, made for the purpose of exhibiting the food of 
these insects as related to particularly injurious species, and these 
are followed by a summary and discussion of the food of each 
family, taken as a unit. The tables exhibit, first, the food of the 
family under ordinary circumstances; second, under peculiar con- 
ditions; and, third, under all the circumstances, taken together. 
FAMILY CARABID M. 
My notes upon the food of this family are derived from the 
dissection and study of one hundred and seventy-five specimens, 
representing thirty-eight species and twenty genera. Eighty-two 
specimens were collected in miscellaneous situations, twelve were 
taken in a field infested by cabbage-worms, ten in a corn-field 
overrun by chinch-bugs, and seventy-one in an orchard which 
was being destroyed by canker-worms. The first collection of 
eighty-two specimens from various situations represented thirty- 
two species, belonging to eighteen genera. They were obtained 
in different parts of the State, from DeKalb County in the north 
to Union in the south, and at all seasons of the year, from April to 
October; and doubtless represent fairly well the food of the 
family in Illinois during the entire year. The collections illus- 
trating the food of the Carabidse as related to the cabbage-worm 
were made in a field of young plants at Normal, 111., in April, 
1882, where the larvae of Acjrotis annexa were abundant and 
destructive. The collection showing the food of this family in 
the presence of the chinch-bug, consisted of ten specimens of a 
single species found in July, 1882, very abundant about the roots 
of corn in a field where the bases of the stalks were largely cov- 
ered by young chinch-bugs. The third special collection con- 
sisted of seventy-one insects, representing nineteen species, ob- 
tained in May of two successive years (1881 and 1882) in an 
