1916 



ENTOMOLOGICAL SOCIETY 



143 



All the Carabids were actually ob.st'rved at work dovouriiio- maggots in the 

 field, hence are predacious on the maggot under strictly natural conditions. The 

 Staphilinids occurred in numbers in such close vicinity to infested roots, that there 

 is little doubt they also are predacious under natural conditions. Their habits- were 

 mostly studied in confinement. 



Table B — Cababid Adult Appetite Record. 



Staphylinid Adult Appetite Record. 



To interpret the Table B correctly it is necessary to understand that the 

 beetles were offered food according to what happened to be on hand to feed them, 

 and further that on several days the beetles were deprived of their favorite food, 

 i.e., small maggots and eggs and were fed on large maggots. In this way, in the 

 first place, therefore, they were not allowed to choose their own food, hence the 

 above record does not indicate any special choice of food, and in the second place 

 while the beetles lived for some considerable time, part of that time they were 

 starved, in the effort to induce them to devour the large maggots, hence the appetite 

 record is lower per day than it would be if the diet had consisted entirely of small 

 maggots and eggs. 



The detailed daily record of these several beetles makes exceedingly interesting 

 reading from the original notes. I do not consider it possible to include them in 

 this paper, or to publish them in the proceedings, as they would occupy too much 

 space. The Table B gives merely the bald statements without those fine points 

 of interest incident to the feeding. 



