SEXUAL TENDENCIES IN MONKEYS 305 



and evidently bent on an attack. Grace gave her hind quarters 

 a quick jerk, dismounting Jimmy II. She then began to bark 

 angrily and dashed at Jimmy II, who fled up the side of the cage 

 to escape her attack. Sobke joined in the chase. When Jimmy 

 II made good his escape Grace invited Sobke to copulation, 

 thus terminating the episode. 



Observation 9. 1-Bridget-M-r, 4-Pat-M-r, and 2-Mike-M— 

 (sexually mature but not full grown) had been at large several 

 months. Pat was the dominant male and Bridget dominated 

 Mike. During Pat's absence in a neighboring tree Bridget 

 invited Mike to copulation. Pat descended upon them before 

 the act was completed, and Bridget dismounted Mike with a great 

 show of anger and led Pat in pursuit of Mike. This and the 

 above episode may be regarded as characteristic of any monkey 

 when in danger of an attack by a larger one. I have often made 

 such observations as the following one: Two small monkeys 

 were eating in close and peaceful proximity to one another. A 

 larger monkey approached with threatening croaks, obviously 

 intent on an attack. The monkey nearest the approaching 

 enemy quickly turned upon his small companion, and by scream- 

 ing at him angrily enticed the large monkey to join him in pursuit 

 of his innocent victim. Such behavior is of daily occurrence 

 among monkeys when they are at large. 



Situation 6. Female and five males having access to the 

 alley and four cages. One of the males is sexually mature, one 

 is sexually immature and three are eunuchs. A male baboon, 

 many times larger than any of these animals, is given access to 

 them. 



Observation 10. 11-Grace-Papio — (sexually mature), 14- 

 Jimmy-II-M-c (sexually mature), 24-Mutt-M-cr (sexually im- 

 mature) and the three eunuchs (one adult size and two smaller 

 than adult size) had had access to the alley and four of the cages 

 for a week. 12-Sandy-Papio — (sexually mature and of great 

 size as compared with the other five monkeys) was then allowed 

 to enter the alley. 



Before Sandy's admission to the band Jimmy II, who had 

 previously allowed Grace to dominate him, dominated the 

 female and the four males. Grace copulated freely with him, 

 but whenever she encountered any of the smaller monkeys in 

 the alley during one of Jimmy II's frequent absences in one of 



