The Food Relafioiiit of the Cfarabida' and Coeeinellido'. 39 



Gexus Brachyxus. 



A single specimen of lirdchymis futiuois^ cauorlit in Central 

 Illinois, in May, had taken only liquid animal food. 



Genus Galerita. 



Seventeen specimens of Galerita jaims^ four collected in vari- 

 ous situations, and thirteen in the orchard in Tazewell County, 

 had made a much more varied record. All of the group first 

 mentioned had eaten insects, which amounted to eighty-eight per 

 cent, of their food, nearly all caterpillars of undetermined species. 

 The remaining twelve per cent, consisted of vegetable food eaten 

 by two of the specimens, and was apparently derived chiefly 

 from the seeds of grass. A larger ratio of animal food is 

 noticed in the thirteen taken where canker-worms abounded. 

 Here vegetation amounted to only six per cent., all of exogenous 

 origin, as shown by the branching bundles of spiral cells in the 

 vegetable fragments noticed, while the animal food amounted to 

 ninety-four per cent. Insects stand at eighty-five per cent., seven 

 per cent, being Diptera, one per cent, unrecognizable insect larva?, 

 and the whole of the remainder caterpillars. The last were 

 nearly all easily determined as canker-worms, which amounted to 

 a little over half the food. Seven individuals of the thirteen had 

 eaten these worms. Five per cent, of the food (taken by three of 

 the specimens) consisted of spiders, and four per cent, (taken by 

 a single specimen) was animal food, not otherwise determinable. 

 The remains of a caterpillar in the stomach of a single beetle 

 were clearly distinguished as those of a noctuid larva (cutworm). 



If from the ratios of animal food taken by the examples from 

 the orchard we subtract the ratio of canker-worms (fifty-two per 

 cent.) the remainder is just seven times the ratio of vegetation eaten. 

 Recalling the percentages of animal and vegetable food taken by 

 the four specimens first mentioned, we find that here also the 

 former is almost exactly seven times the latter. This shows beyond 

 question that the canker-worms eaten were in addition to the ordi- 

 nary ratio of animal food taken by this species under the usual 

 conditions. 



