SEXUAL TENDENCIES IN MONKEYS 301 



assumed the sexual position, viz. : Hind legs fully extended to an 

 almost vertical position; forelegs sharply flexed; tail erect; 

 body inclined forward and downward from the hips; head 

 sufficiently extended and rotated to enable the female to direct 

 her gaze upward and backward. The male grasped the female at 

 the angles formed by the juncture of hips and body with a hand 

 on either side, and in mounting her, he clasped her legs just above 

 the knees with his feet. He leaned forward and downward 

 during copulation, smacking his lips violently. The female 

 seemed to invite contact with his mouth, for she persistently 

 thrust her smacking lips towards the male, until he leaned still 

 further downward and touched her lips with his own. Shortly 

 before copulation ceased, the male uttered a succession of shrill 

 little cries, and greatly increased the vigor of his copulatory 

 movements. As soon as he dismounted the female, he took her 

 tail in one hand and elevated it, then with his free hand examined 

 her vaginal labia, at the same time closely inspecting them w T ith 

 nose and eyes. Then he lay down and the female examined his 

 fur " flea-hunting." 



Observation 2. 1 1-Grace-Papio— (sexually mature) , 14-Jimmy- 

 M-c (sexually mature), the three eunuchs and a number of 

 immature monkeys had been at large for several weeks. Grace 

 had freely copulated with all of the males, including the eunuchs. 

 16-Sobke-M-r (sexually mature) had occupied a cage with a 

 mature female for several weeks. He was now liberated. As 

 soon as he and Grace caught sight of one another they began 

 smacking their lips. Their subsequent behavior was essentially 

 similar to that of the animals described in observation 1. 



Situation 2. Male and female after several days' access to 

 one another, during which copulation had been of frequent 

 occurrence. 



Observation 3. After Timmy and Maud had been together one 

 week (date of this observation is one week later than that of 

 observation 1, q.v.) Timmy was offered a loquat. He descended 

 from his shelf, leaving Maud still perched upon the shelf. As 

 soon as he had reached the floor, and had received and eaten 

 the loquat, he began to stalk his mate, slowly ascending with 

 tail erect, gaze fixed upon the female, and head jerked forward 

 now and then as if to threaten violence to Maud. Such behavior 

 often precedes an attack upon another male. When he finally 



