150 Mr. H. St. Donisthorpe on Ants' Nests. 
nature when a fusca nest is disturbed, the ants imme¬ 
diately scatter and run away, all disappearing in a very 
short time. This is by no means the case with rufibarhis 
V. fusco-rufibarhis. 
In future for further experiments I shall only use fusca 
^ and shall next try ^ ^ of i^. rnfa. 
The two successful experiments -with fusca show that it 
is quite possible for a sanguinea ^ to start a colony in this 
way, but it seems rather a precarious method to depend 
upon. 
