304 G. V. HAMILTON 



for copulation, smacking his lips as if to invite copulation with 

 Skirrel — Grace had descended to the floor in quest of food. As 

 soon as Skirrel approached the netting Timmy whirled and 

 thrust his forefinger through the netting into Skirrel's eye. 



Situation 4. Male taken from his mate and given to a female 

 in an adjacent cage, the first female being left alone. 



Observation 7. 10-Timmy-M-c and 11-Grace-Papio — had 

 occupied a cage together for a week, and 7-Becky-M-r occupied 

 an adjacent cage. (All subjects sexually mature.) Timmy was 

 taken from Grace and given to Becky. Timmy copulated with his 

 new mate on the shelf. Grace, now alone and on her shelf, 

 barked angrily and tried to get at Becky through the netting. 

 Timmy was tolled to the floor, leaving Becky and Grace on their 

 shelves, and separated only by the netting. Grace tried to engage 

 Becky in a combat through the netting, but Becky withdrew to 

 the opposite end of the shelf. Then Grace began to smack her 

 lips, and assumed the sexual position, although the male was not 

 in sight. Becky approached the netting, whereupon Grace 

 whirled (she had thrust her hind quarters against the netting) 

 and poked at Becky's face through the netting. 



Situation 5. Female at large with band containing dominant 

 male and a sexually mature smaller male. Female detected by 

 dominant male while she is copulating with the smaller male. 



Observation 8'. 11-Grace-Papio — , 16-Sobke-M-r and 14- 

 Jimmy II-M-c (all three animals sexually mature) were at large 

 with a band containing eight other monkeys. Sobke dominated 

 the band, and Jimmy II had not yet learned to dominate Grace. 

 Sobke and Grace frequently copulated, but at times Grace tolled 

 Jimmy II to a place secluded from Sobke and invited him to 

 copulation. The male baboon's sexual organ being much larger 

 than the male macaque's and of different formation, Grace's 

 sexual hunger seems to be insatiable when she is denied access 

 to the male baboon. 



Sobke was perched in a tree outside the yard, and Grace and 

 Jimmy were in the yard, where I was seated making observations. 

 The latter two animals were chattering at me, soliciting food, 

 when Grace began to smack her lips and assumed the sexual 

 position in invitation to Jimmy II. He mounted her, and copu- 

 lation was well in progress when Grace and I heard a noise in the 

 tree above us. We saw Sobke approaching, croaking angrily 



