94 



Discussion. 



Mr. Crawley asked if ants inhabited thorns during winter 

 and summer. 



W. M. Wheeler stated that they did so, contrary to Belts's 

 statement, the colonies becoming one colony. 



E. B. Poulton asked if food bodies existed, and W. M. 

 Wheeler replied that in the E. Indies they did, but were not 

 always visited. 



In reply to a question by H. Skinner, W. M. Wheeler said 

 that animals were not deterred by ants, sloths having been 

 observed to feed on them. 



P. P. Calvert said that in one and the same locality (Turru- 

 cares) in Costa Rica, he had observed Pseudomyrma on the 

 Acacias in August, December, and April, consequently in quite 

 dift'erent seasons, wet and dry. 



H. Scott asked if anything were known as to what proportion 

 of Cecropia trees were inhabited by ants, and if that proportion 

 varied in difterent countries where the Cecropia tree occurred. 



W. M. Wheeler replied that the same species of Cecropia 

 can be inhabited by ants in one district and not in another, and 

 instanced Porto Rico, in which island no ants at all were found 

 in the Cecropia trees. 



H. OsBORN then gave his paper entitled : 



Insect Fauna of a Lake Shore. 

 (No manuscript received. — Editors.) 



Discussion. 



H. Scott asked if any adaptions of Caddisfly larvae [Tricho- 

 ptera) to living in the wave zone, such as had been observed in 

 Denmark, had been found, in reply to which Prof. Osborn stated 

 that none had been observed, and that the waves were too violent 

 and the shore too sandy and shifting for any considerable number 

 of Caddisfly larvae to inhabit it. 



The meeting then rose. 



