Ill 
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Genus Chltenius. 
iis abundant genus is represented by twenty-three individuals, 
next to the largest number studied of any genus of Carabidse. 
examples from Southern Illinois, collected from April to Sep- 
oer, belong to the species C. diffinis, C. nemoralis, and C. tomen- 
1 1?. The animal food of these was about three times the veg- 
le. Two-thirds consisted of insects, of which caterpillars alone 
) determinable, and earth-worms eaten by one of the beetles 
e about eight per cent. More than half the vegetable food con¬ 
'd of fungi. Fragments of exogenous plants were recognized in 
of the beetles. A single C. diffinis, taken among the cabbage- 
ns, had eaten only insects, chiefly a caterpillar and a larva of 
hetle; a mere trace of endogenous vegetation was also detected, 
ixteen specimens collected among the canker-worms, three were 
rythropus and thirteen C. diffinis. Cut-worms made about one- 
,1 of the food of the first, and earth-worms the remaining two- 
Is. The latter were easily distinguishable by the peculiar spines 
ed with dirt in the stomachs of the beetles. About ninety per 
|. of the food of the other species was of animal origin, and 
-it half the vegetable food was fungi. Insects made seventy-two 
cent., nearly half caterpillars, of which the greater part (thirty : 
per cent.) was canker-worms. Fragments of a fly were observed 
re of the beetles, and another had eaten one of the Telephoridce. 
js and myriapods (Geopliilus) had also been devoured by one. 
■ i- 
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Genus Agonoderus. 
fteen specimens of the superabundant little beetle Agonoderus 
na were studied, ten of which were collected from the ground 
it hills of corn in a field which was badly infested by chinch- 
i, and contained also a great many plant lice ; while many ants of 
jecies everywhere common, were seen about almost every hill, 
pnents of chinch-bugs were found in four of the beetles, and 
unted to about one-fifth of the food of all, and plant lice taken 
lalf that number amounted to* about eight per cent.; a single 
J Lasius fldvus, eaten by one, was rated at five per cent., and 
!r‘ insects brought the general average of the class up to tliirty- 
per cent. Vegetation made just half the food, all fragments of 
higher plants, except two per cent, of common fungi. Four 
Umens, from different situations, had made a similar record, 
ring only by the presence of a few mites in the stomach of one 
Aes$ beetles. Eleven per cent, of fungi was taken by the group 
mentioned. The circumstances of capture, together with the 
ents of the stomach of one of these beetles, indicated that it 
I made its meal chiefly from the seeds of June grass; but the 
i linder of the vegetable food could not be more definitely classi- 
A single Agonoderus, taken among the cabbages, had eaten 
i undeterminable food. 
Genus Anisodactylus. 
iis large and abundant genus is represented by thirty-one speci- 
j s^belonging to six species. Nineteen specimens, collected in va- 
