40 llir Food Rrlnti(in>< of tli.c Carabiclo' and Corciiicl/idir. 



Genus Loxopeza. 



Three specimens of this ^eims were studitMl, all belonging to 

 the species L. atrii'enfrif<^ collected in Julv and September in 

 Northern and Central Illinois. One of these had t^aten immense 

 numbers of minute, oval, binucleate cells, determined by Prof. 

 Burrill as spores of Splucronemei, probably Plioma, a fungus 

 which forms small black sp'ecks upon dead wood, stems of weeds, 

 etc. A second specimen had eaten some undetermined insect, 

 and about equal quantities of three elements, namely: the above 

 spores of Phoma and polhni and anthers of grass, — doubtless blue 

 grass, upon which the insect was taken. A few spores of Hel- 

 minthosporiam were likewise noticed. The crop of a third speci- 

 men, taken at Normal, was distended with an oily liquid, but 

 contained nothing else except a few spores of Helminthosporium. 

 This specinren had probably been sucking the juices of some in- 

 sect. The ratios of animal and vegetable food, as nearly as 1 

 could estimate them, were as forty-four to fifty-six. A specimen 

 of this species, captured in the orchard, had not recently taken food. 



Genfs Calathits. 



Six examples of < '. (/n'(/art'tfs, three from DeKalb County and 

 three from the orchard, are the only representatives of this genus. 

 One-third of the food of those first mentioned consisted of cater- 

 pillars, a second third of other insect larvae, and the remainder of 

 the pollen of grass. The food of the second group was extremely 

 similar, a third consisting, as before, of vegetation, another third 

 of canker-worms, and the remainder of insect fragments not 

 further determinable. 



Genus Platynus. 



The stomach of a single P. decorus^ taken in the orchard, con- 

 tained only liquid animal food. Two examples of 7"*. limhatus^ 

 both from Southern Illinois, in April, had derived about four- 

 fifths of their food from the vegetable kingdom, partly seeds of 

 grass and partly the parenchyma of exogenous plants. The 

 remainder consisted entirely of Aphides (plant-lice). These 

 specimens were doubtless too few to give a correct idea of the 

 average food of the genus as a whole. 



