JO Bulletin American Museum of Natural History. [Vol. XXII, 



placed in a nest with 19 subsericea workers and many nude worker pupae, all 

 taken from a medium-sized wild nest. She was at once pinioned by six of the 

 workers and kept in a corner for some time. At 5.15 p.m. she was found 

 dead. None of the subsericea workers had been injured. 



Experiment 22. July 11, 12 m., an integra female was placed in a nest con- 

 taining 10 large subsericea woT]s.eTS with two males, a number of larvse and some 

 nude pupae taken from an old mound nest. She was at once attacked and pulled 

 about the nest by her legs and antennae. She made no atterapt to retaliate, 

 but remained perfectly passive, while making rapid and apparently conciliatory 

 movements with her antennae. The movements were very much like those of 

 the female consocians on entering an incerta nest and meeting one of the workers. 

 The workers finally succeeded in dragging her out into the light chamber, where 

 she was killed and abandoned by 2 p.m. 



Experiment 25. July 23, 8 a.m., a fine female integra was placed in a nest 

 with 16 subsericea workers of different sizes and many naked pupae from a 

 rather large colony. She was soon seized by her legs and antennae and dragged 

 about the nest. She submitted with great docility, and whenever her an- 

 tennae were free kept them in constant and rapid motion, as if begging for 

 more merciful treatment. There was so little excitement on the part of the 

 subsericea not engaged in maltreating the female that they did not even remove 

 their pupae. At i p.m. the female was found dead. 



Experiment 24. July 4, 10 a. m., a female integra was placed in a nest with 

 three very small subsericea workers, 25 worker cocoons and a few larvse. The 

 workers attacked the female very gingerly and soon released her. They finally 

 settled down with their brood in one comer of the nest. The female kept 

 hanging about them. These conditions were maintained till July 9, when the 

 female was found to have taken up her station about an inch away from the 

 comer occupied by the subsericea and their brood. She had secured five small 

 larvae and was guarding them carefully. Whenever light was admitted into 

 the nest she carried them away and tried to conceal them. Later in the day 

 both the female and the workers were snuggling together in a comer. From 

 July 10-13 these conditions remained unchanged: the female had been defi- 

 nitively adopted by the workers. July 14, one small callow subsericea had 

 hatched during the night and another during the afternoon. On the following 

 day (July 15) three more callows appeared and by 8 a.m. there were in all 10 

 workers. The illumination of the two chambers of the nest was reversed. 

 There was no movement of the ants during the morning, as the light was rather 

 subdued. At 12 m. the nest was placed near a window. One of the three 

 original workers entered the dark chamber but soon returned and began to pull 

 the female by the mandible and then by the fore leg, whereupon she again 

 ran into the dark chamber, returned and dragged the queen into it. This 

 demonstrated the complete adoption of the female. During the remainder of 

 the month the worker cocoons slowly hatched: by July 18 there were 12 sub- 

 sericea workers, by the 23d, 14, by the 25th, 18, and by Aug. i, 23. At the 

 present writing (Oct. 12) the queen and her colony of small workers are in 

 excellent condition and, although they occupy only a small portion of the nest 

 are always together. The queen is fed and cleaned by the workers as if she were 

 their own mother. 



