LIFE HISTORY OF CARPENTER ANT. 



181 



capture until several days after the first callows emerged I did 

 not see either of them take food, neither was there at any time 

 any apparent diminution of their food supply. For several days 

 at a time I gave them only the merest drop of sweetened water, 

 to see whether they would make a meal of it or not, but I could 



Fig. I 1 . A piece of linden bark showing a cavity in which a queen of C. pennsy- 

 vanicus and her first season's brood of callows were found. 



see no evidence that any of it was eaten. This observation, taken 

 together with the fact that a number of outdoor colonies of sizes 

 similar to these were found sealed up in small cavities with no 

 communication with the outside world, as shown in Figs I and 2, 

 confirms the conclusions of McCook and others that young queens 

 take no food while rearing their first callows. 



In addition to these two colonies, reared from the start in arti- 

 ficial nests, I have collected and counted those represented by 

 Tables I. and II. 



1 The photographs for the illustrations were taken by Dr. C. F. Hottes, Professor 

 of botany in the University of Illinois. 



