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



about considerably but was very conciliatory. By reversing the illumination 

 at 5.30 P.M. the neogagates were made to move to the diagonally opposite corner 

 of the nest. Females 5 and 6 at once followed them and stopped within an 

 inch of the brood, thereby showing a craving to join the colony. July 15 

 female No. 5 was removed from the nest, as she seemed to be too fond of the 

 company of No. 6. The latter, now the only female in the nest, was seen, 

 feeding a callow. At 6.30 p. m. she was found dead in the nest. Another 

 female (No. 7) was at once introduced. July 16, 7 a.m. she was resting 

 peacefully with the workers and their brood. No hostilities were witnessed 

 till 4.30 P.M., when she was being pulled about. She was soon released and 

 again pushed herself into the cluster of resting workers. Her attitude when 

 approached by the workers was extremely conciliatory: she crouched and 

 folded her antennse. From July 17 to 19 she was occasionally dragged about 

 by an antenna and then left quite unmolested for long periods or was even fed 

 and licked by some of the workers, especially by the callows. The number of 

 workers had risen to 21 by July 19. From July 20 to 26, when the experiment 

 was closed, no hostilities were witnessed. Female No. 7 had been definitively 

 adopted and was on the best of terms with the workers, which now numbered 

 24. During this time the behavior of the nepticala female was much like that 

 of F. consocians: she was constantly licking or feeding the workers or being fed 

 by them. 



Experiment 18. July 14, 1.15 p.m., a dealated female nepticula (No. i) 

 was placed in a nest containing only five neogagates workers and some nude 

 pupae. These workers were of small size and had been taken from a depauper- 

 ate wild colony comprising only about 15 individuals and a few male and 

 worker pupae. No female was found in the nest. At 1.40 p. m. the nepticula 

 was fiercely attacked by a worker and driven away from the pupse which were 

 in a corner of the nest. She wandered restlessly about. July 15, 7 a.m. she 

 was lurking near the workers and their brood. At 7.30 she was pulled away 

 by the largest worker. At 2 p. m. she was dying with outstretched limbs. 

 Another female (No. 2) was introduced. At 6.30 p. m. she was seen hanging 

 about the workers and brood and furtively feeling of the latter. July 16 

 7 A.M., she was resting with the brood, at 7.20 she was dragged away by an 

 antenna. July 17 and 18 she was resting at the diagonally opposite corner 

 of the chamber from the neogagates. At 9 a. m. on the latter date she was very 

 faint, and died at about noon. Another female (No. 3) was introduced. July 

 19. She persisted in hanging about the neogagates and their brood as if begging 

 for adoption, but was pulled about considerably during the day. At 5 p. m. 

 she was dead. Another female (No. 4) was at once substituted. This female 

 remained alive in the nest till July 26 but was not adopted. She was pulled 

 about from time to time, but nevertheless evinced a strong desire to join the 

 little colony, as was shown by her returning again and again to the brood. It 

 is probable that she would have been adopted had it been possible to continue 

 the experiment. 



Experiment ig. Aug. 9, 7 p.m., two mature and naturally dealated nep- 

 ticula females were placed in a nest containing 30 small and medium-sized 

 neogagates workers, most of which had been hatching in an artificial nest since 

 Aug. I. Each of the females was at once attacked and pulled about sometimes 

 by as many as five or six workers at a time. They endured this treatment 



