136 THE entomologist's record. 



B. Experiments with a small incipient colony of L. n'Kjer, 

 founded in 1911, consisting of about 100 ^ ^ , queen and brood, 

 (nest 42). 



Exp. 4. September 1.5th, 1912. — An artificially deiilated L. 

 iiiiibratits 5 was placed in the outer chamber of the nest. Several 

 ants came to her, and were greatly excited, but not hostile. She 

 remained motionless whenever an ant touched her. After ten minutes 

 she entered the dark chamber of her own accord, but was attacked and 

 soon held by every limb. Next day she was dead. 



Exp. 5. September 16th, 1912. — A naturally deiilated L. 

 iuiibratu:^ 2 was isolated in a glass tube with one ^ from nest 42. 

 After some time she killed the ^ . Next day the tube was opened and 

 placed inside the nest. The 2 came out, entered the inner chamber 

 and patiently submitted to the attacks of a few ^ ^ . The L. nif)er 

 2 then came up to her and saluted her, and kept returning and 

 saluting hei" for several hours, caressing the intruder with her 

 antennae. Some ^ ^ saluted her also, but later in the afternoon she 

 was fiercely attacked and so badly injured that I removed her. 



Exp. 6. September 17th, 1912. — Another naturally deiilated 

 iniibratns $ was confined in the outer chamber of nest 42 with a few 

 ants, who at first attacked her ; some hours later they were all on 

 friendly terms. In the evening of the 18th I removed the barrier to 

 the inner chamber, but on returning after twenty minutes found the 

 2 nearly dead. 



C. Experiments with a small colony of L. ni(je)- consisting of 

 about 200 ^ ^ and larvjT?, but no queen (nest 41). 



Exp. 7. September 16th, 1912. — Two ^ ^ from this nest were 

 confined in a tube with a young fertile 2 of L. Kinbratiis, who 

 immediately killed one of them, and attempted to catch the other. I 

 then put another ^ in the tube. Some time afterwards both ^ ^ 

 were killed. Next afternoon I placed the tube in the nest. The ? 

 remained in the tube, but several ^ ? visited her and examined her 

 without any hostility. Presently she came out of the tube surrounded 

 by ants, some of which saluted her, and entered the inner chamber, 

 where she walked quietly about, only one or two ^ ^ showing any 

 hostility. In about an hour's time, however, there was a complete 

 change in the attitude of the ants, and they began to attack her with 

 great animosity. Eventually, when she was nearly dead, I removed 

 her. 



In this case it is conceivable that in the process of killing the three 

 7wjer § ^ , the 2 acquired the " nest aura," which, however, wore off 

 in about an hour. 



Exp. 8. September 18th, 1912. — I confined a naturally deiilated 

 2 of L. nvjer in the outer chamber of nest 41, with a few ^ ^ . 

 Unlike the nmbratns 2 2 she avoided these ^ ? as much as possible. 

 Some hours later there was a dead ^ on her foreleg. Next morning 

 as she was still uninjured, and a few ^ ^ saluted her, I removed the 

 barrier to the inner chamber. She entered of her own accord, but 

 immediately reappeared and tried to escape from the nest. After 

 sometime she again entered the inner chamber, but was seized by an 

 antenna and presently attacked on all sides. By 2.0 p.m., she was 

 dead. 



