NEST AS POPiE AND SUBSEQUENTLY RESTOEED. 237 



Je crois dii reste que c'est au moyen de perceptions 

 olfactives de contact." * 



I have, however repeated my previous observations, 

 with the same results. 



At the beginuinof of August I brought in a nest of 

 Lasius niger containing a large number of pupae. 

 Some of these I placed by themselves, in charge of three 

 ants belonging to the same species, but taken from a 

 nest I have had under observation for rather more than 

 ten years. On August 28 1 touk twelve of the young 

 ants, which in the mean time had emerged from the sepa- 

 rated pupsB, selecting some which had almost acquired 

 their full colour. Four of thein I placed in their old 

 nest, and four in that from which their nurses were taken. 



At 4.30 in their own nest none were attacked. 



„ ,, nurses' nest one was attacked. 



5.0 „ own nest none were attacked. 



„ „ nurses' nest all four were attacked. 

 8.0 „ own nest none were attacked. 



„ „ nurses' nest three were attacked. 



The next dny I took six more and marked them 

 with a spot of paint as usual, and at 7.30 replaced 

 them in their own nest. 



At 8.0 I found 5 quite at home ; the others I could not see, but none 



were attacked. 



crit. sur les Sensations des Insectes,' 



