Tlie Fund Relatione nf fhe Carahkhr und CucrinellidiC. 41 



Gexus Evarthrus. 



Five specimens of fj. (■<)Iohi<iii^^ taken at various <lates and 

 places, had derived about one-tenth of their food from endogens, 

 and the remainder wholly from insects. Twenty per cent., eaten 

 by one of the beetles, was recognized as caterpillars. Scaraba-- 

 idiB are credited with another twenty per cent., and undetermined 

 larvae of Coleoptera with about an e(jual latio. Minute quantities 

 of fungi were noticed in the stomaclis of two of these beetles, 

 and traces of undetermined Alga? in one. 



Two examples of i?. sodalis, takeii in tlic Tazewell County 

 orchard, had consumed only insects, all canker-worms, except 

 traces of an ant and a sinijle p-nat. 



The insect ratio of the genus as represented by these seven 

 specimens, stands at ninety-three per cent. 



Genus Pterostiouls. 



Thirteen specimens were dissected, i-epresenting /-*. pcnniin- 

 (lus, P. sat/i, and P. lucuhhoidK.^. 



The number of each species is not suHicient to give distinctive 

 food characters, and the genus may therefore best be treated as a 

 whole. Seven of the specimens, taken in miscellaneous situa- 

 tions in Central Illinois in April, May, and September, had found 

 about one-fourth of their food in the vog-etable kingdom, about 

 one-third of which consisted of undetermined fungi, and the 

 remainder chiefly of exogenous plants. A few spores of Helmin- 

 thosporium, probably accidental, were noticed in the stomach of a 

 single beetle. Forty-three per cent, of the food consisted of 

 insects, among which Hymenoptera oidy were recognized. A 

 single mite occurred in one of the beetles. Thi%e specimens 

 taken in the orchard infested by canker-worms, had eaten endo- 

 genous vegetation, to the amount of al)Out one-fifth of their food. 

 Caterpillars made eleven per cent., and uii(let(M'mined insects two 

 per cent., tlie remaining ratio being ac(;ountetl for by the presence 

 of liquid animal food. Two-thiiils of the contents of thi-ee 

 specimens taken among the cabbages, consisted of animal matter, 

 half of which was clearly recognized as the larvje of ,l(/roi/.s 

 (iiinrxo infesting the iield. Tlie renuiining third, composing the 



