N6 ON THE HABITS OF ANTS. [LECT- 



July 21st. At 10.15 T put in two more of the old 

 friends. At 10.30 neither were being attacked. At 11, 

 ditto. 12, ditto. 2, ditto. 4, ditto. 6, ditto. 



October 7th. At 9.30 I put in two, and watched 

 them carefully till 1. They joined the other ants, and 

 were not attacked. I also put in a stranger from 

 another nest. Her behaviour was quite different. She 

 kept away from the rest, running off at once in evident 

 fear, and kept wandering about, seeking to escape. At 

 10.30 she got out. I put her back, but she soon 

 escaped again. I then put in another stranger. She was 

 almost immediately attacked. In the meantime, the old 

 friends were gradually cleaned. At 1.30 they could 

 scarcely be distinguished. They seemed quite at home, 

 while the stranger was being dragged about. After 2, I 

 could no longer distinguish the friends. They were 

 however certainly not attacked. The stranger, on the 

 contrary, was killed and brought out of the nest. 



This case, therefore, entirely confirmed the preceding ; 

 while strangers were attacked, friends were amicably 

 received. 



In most species of ants, the power of smell is very keen. 

 I placed ants on a strip of paper, each end of which was 

 supported on a pin, the foot of which was immersed in 

 water. They ran backwards and forwards along the paper, 

 trying to escape. If then a cam el's -hair pencil was sus- 

 pended just over the paper, they passed under it without 

 taking any notice of it ; but if it was scented, say with 

 lavender-water, they at once stopped when they come near 

 it, showing in the most unmistakable manner that they 

 perceived the odour. This sense appears to reside, though 

 not perhaps exclusively, in the antennae. I tethered, for 



