Sovie Experiments with Ants Nests. 149 
two rufibarbis v. fusco-rujibarbis nests. Both 5 ? killed the same 
day. 
No. 8. July 23rd, introduced virgin sanguinea $, from Bewdley, 
having removed her wings, into a/usca nest. 5 attacked 
and killed same day. 
No. 9. July 2.3rd, removed the wings from a virgin 5 sanguinea, 
taken at Bewdley, and placed her in a tin with some pupae. July 
24th, introduced this $ into the fusca nest from Shotover. 
Attacked by 2 ^ 5, which she killed. Later 5 captured some of 
the pupae and sat on them in a corner. The ^ ^ collected the rest 
of the pupae into another corner. Later 5 injured another ^ 
killed one that fastened on to her leg, and captured more of the pupae. 
July 25th, all 9 $ killed but one, $ sitting on all the pupae in one 
corner. July 26th, 5 carrying pupae about and arranging in 
corner, where she sat upon them. I introduced a few rufibarbis v. 
fusco-rujibarbis 9 ^ into the nest. When these approached the 
pupae the 9 sprang forward and seized them and shook them as a 
terrier shakes a rat, and killed them all. 
This experiment was quite successful. The ^ killed all 
the ^ and took possession of all the pupae. 
No. 10. July 25th, introduced virgin 5 sanguinea, from Bewdley, 
into a rufibarbis v. f'usco-rufibarbis nest. On J uly 23rd I had removed 
the wings and placed her in a small dark tin with a few pupae. 9 
was attacked and killed in two hours. 
No. 11. July 25th, introduced a virgin 9 sanguinea, from 
Bewdley, which had been treated like the last one, into a rufibarbis 
Y. fusco-rujibarbis nest. 9 attacked and killed several 9 9- July 
26th, 9 dead. 
No. 12. July 28th, introduced virgin 9 from Bewdley, 
after same treatment, into a rufibarbis v. fusco-rujibarbis nest. Much 
attacked by 9 9- July 29th, 9 dead. 
No. 13. July 28th, separated 6 rufibarbis y. fusco-rujibarbis 9 9 
with pupae into one compartment of nest. August 9th, introduced 
virgin 9 sanguinea, from Bewdley, which had shed her wings. 
Immediatel}^ attacked by 2 of the 9 ^ > und killed the same 
morning. 
It will thus be seen that in no single case was a 9 
sanguinea accepted by rufibarHs v. fusco-rujiharhis ^ the 
9 always being killed, and generally the same day she was 
introduced. This ant is a much bolder race than pure 
fusca, the latter being a timid and cowardly species. In 
