44 
The Food Relations of the Carabidce and Coccinetlidce. 
Genus Anisodactylus. 
This large and abundant genus is represented by thirty-one 
specimens, belonging to six species. Five specimens of A. rusti- 
cus were examined, captured in McLean and DeKalb Counties in 
May, June, and July. Two of these had taken only liquid animal 
food, but the remaining three had eaten no animal matter at all. 
Among the fungi found, Cladosporium and Peronospora were 
recognized, and fragments of Hepaticae were noted in two of the 
beetles. Two specimens of A. harrisi , taken in Union County 
in April, 1882, had eaten only vegetation, all seeds of grass and 
of other plants. A single A. discoideus from McLean County in 
June, contained nothing but liquid food. Seven examples of A. 
baltimorensis , widely distributed in time and place, had derived 
only about fourteen per cent, of their food from the animal king- 
dom, all taken by one of the beetles, whose stomach contained 
only chyme. About half of the eighty-six per cent, of vegeta- 
tion, composing the entire food of the remaining six specimens, 
was demonstrably obtained from the seeds of June grass, upon 
which several of the insects were taken. Two examples of A. 
sericeus from Northern Illinois had made about three-fourths of 
their food of grass, and the remainder of unrecognizable insects. 
In the stomachs of two specimens of A. opaculus , fragments of 
seeds and other vegetation were the only objects found. 
Taking together the nineteen specimens of this genus above 
mentioned, collected in various places, we find that animal food 
made about one-fourth of the total, and that the vegetation as far 
as recognized was chiefly derived from June grass and other 
graminaceous plants. 
The record of ten specimens taken from the canker-worm 
orchard, is not especially different from that of the foregoing 
group. Only one of these had eaten animal matter at all, ninety 
per cent, of the food of this consisting of undetermined Diptera. 
Here, again, the recognizable vegetation was chiefly graminaceous, 
only ten per cent, being clearly derived from exogenous plants. 
Two specimens from the cabbage field afford no occasion for 
special remark. The stomach of one was distended with liquid 
animal food ; that of the other contained vegetation only. 
