42 The Food Relations of the Carabidte and Coccinellidce. 
entire food of one of the beetles, consisted wholly of fragments 
of grass.* 
Genus Amaea. 
Six specimens of this genus were dissected, three of A. cari- 
nata , one of A. angustata , and two of A. impuncticollis. Three 
specimens of A. carinata , taken in Southern Illinois in April, 
1882 , had eaten only vegetation, partly derived from gramina- 
ceous plants, and partly consisting of seeds and exogenous tissues. 
About one-fourth of the food was recognizable as fungi, chiefly of the 
genus Peronospora. Ninety per cent, of that of a single A. an- 
gustata, taken in June, consisted of mites, the remainder being 
fragments of grass. An A. impuncticollis , taken in the orchard 
with the canker-worms, had eaten only vegetable food, chiefly 
undetermined, but with traces of fungi. Another of the same 
species from the cabbage field, had derived its food about equally 
from plant and animal sources, that from the former consisting 
chiefly of grass. 
Genus Diclelus. 
Three examples of Diccelus elongatus had taken only animal 
food, as indicated by the fluid contents of the stomachs. One of 
these was found in the orchard, and the other in Central Illinois. 
Genus Ciil^enius. 
This genus is represented by twenty-three individuals, the next 
to the largest number studied of any genus of Carabidae. Six 
examples from Southern Illinois, collected from April to Septem- 
ber, belong to the species C. difinis, O. nemoralis , and G. tomen- 
tosus. The animal food of these was about three times the veor- 
O 
etable. Two-thirds consisted of insects, of which caterpillars 
alone were determinable; and earth-worms eaten by one of the 
beetles made about eight per cent. More than half the vegeta- 
ble food consisted of fungi, which included fourteen per cent, of 
some fleshy fungus, apparently Coprinus, together with spores of 
Dematiei. Fragments of exogenous plants were recognized in 
one of the beetles. A single C. di finis, taken among the cab- 
*A specimen of P. lucublandus was seen by Mr. F. M. WebBter 
making a meal from a dead P. sayi. 
