The Food Relations of the Carabidce and Coccinellidee. 
45 
Genus Amphasia. 
Four examples of A. inter stitialis indicated that this species is 
almost strictly vegetarian, only three per cent, of the food con- 
sisting of insects. Of the remaining ninety-seven per cent., little 
can be said except that it was certainly of vegetable origin. 
Genus Bradycellus. 
A single specimen of JB. dichrous had eaten only insects, which 
could not be further classified.* 
Genus Harpalus. 
Nineteen specimens of Harpalus were studied, belonging to 
the three species caliginosns , pennsylvanicus , and herhivagus. 
Two individuals belonging to the first of these species, from 
Normal and Towanda in August and September, had taken about 
one-tenth of their food from insects (caterpillars and Diptera). 
Twenty per cent, of unrecognizable animal food and five per cent, 
of mites bring the general average up to thirty-five per cent. 
The sixty-five per cent, of vegetation eaten consisted chiefly of 
tissues of grass. A little pollen of Composite, and other exogen- 
ous structures were likewise recognized. Three per cent, was 
fungi, all spores of Helminthosporium. Seven specimens of FI. 
pennsylvanicus , caught in Northern, Central, and Southern Illi- 
nois, in April, August, and September, had taken about one per 
cent, of their food from the animal kingdom. This included an 
ant eaten by one of the beetles, and a few mites taken by another. 
About half the vegetable food was not further recognizable. 
Twenty-nine per cent, was the pollen of rag-weed, taken by two 
beetles captured upon that plant, and fourteen per cent, was 
derived from June grass. Fungi made eight per cent, of the 
food of these beetles, a little of it Helminthosporium, but chiefly 
Peronospora. Three examples of II. herhivagus , taken in North- 
ern Illinois, had eaten only vegetation, about one-third of it 
graminaceous, and another third fungi. Only seven per cent, of 
the food of the above twelve specimens of this genus, taken from 
*Mr. Webster reports a specimen of B. rupestris taken in 1881 in 
the act of devouring an earth-worm. 
