SEXUAL TENDENCIES IN MONKEYS 303 



Observation 5. 16-Sobke-M-r and 3-Kate-M-r (both sexually 

 mature) had occupied a cage adjacent to that occupied by 

 10-Timmy-M-c and 11-Grace-Papio — (both sexually mature). 

 The males had ceased to copulate vigorously with their mates 

 without first examining their genitalia or chasing and biting them. 

 When Timmy was now separated from Grace and put into Kate's 

 cage — Sobke having previously been removed — he dashed up 

 the side of the cage toward Kate and copulated with her vigor- 

 ously without any preliminary attentions to her. The female 

 displayed sexual excitement, although she had ceased to do so 

 when copulating with Sobke unless he first examined her genitalia 

 or chased and bit her. 



As soon as this observation was completed, Sobke was allowed 

 to enter Grace's cage. He, like Timmy, had ceased to copulate 

 vigorously unless he first examined or chased the female. But as 

 soon as he was given access to Grace he displayed great sexual 

 excitement, and copulated vigorously, without having engaged 

 in any preliminary activities conducive to sexual excitement. 

 After a few days the behavior of the newly mated couples toward 

 one another was essentially similar to their behavior toward 

 their former mates. When they were restored to their former 

 mates, vigorous copulation again ensued without preliminary 

 examining and chasing on the part of the males. 



Situation 4. Female taken from her mate and given to a 

 male in an adjacent cage, her mate being left alone in his cage. 



Observation 6. 10-Timmy-M-c and 11-Grace-Papio — had 

 occupied a cage together for several weeks, and 26-Skirrel-M-c 

 had been alone in an adjacent cage. All subjects were sexually 

 mature. Grace was taken from Timmy and given to Skirrel. 

 As soon as Skirrel began to copulate with Grace on the shelf of 

 their cage Timmy, who was on his shelf and therefore in very 

 close proximity to his former mate and to Skirrel, began to rage 

 at Skirrel through the netting. Skirrel paid no attention to his 

 baffled enemy, although under ordinary circumstances he would 

 have come to the netting and made a hostile demonstration, 

 these two animals being enemies. Timmy continued to rage at 

 Skirrel until the latter had ceased copulation and had assumed 

 a semi-recumbent position on the shelf. Then Timmy went 

 about a foot from the netting and assumed the female position 



