Rau — Sexual Selection Experiments in Cecropia Moth. 299 



Rcs7ilts. — June 10, A. I\I. — The pair found in copulo. 



This shows that the antennae of the female are not 

 an essential factor in mating. 



Experiment 46.— June 8, 10 :00 P. M. 



9 168. Antennae removed. 

 ^■169. 



Object. — Same as Experiment 45; to find if an anten- 

 naless female is capable of mating. ~ 



Results. — .lune 9, 7:00 A. M. The pair found in copulo after only 

 a few hours. 



Experiment 47. — June 8, 8 :00 P. M. 



$ 170. Antennae removed. 



Object. — To see if the antennaless female can mate. 



Results. — ^.Tune 9. The pair found in copulo the following morning, 

 again showing that the antennaless female is quite capable of mating. 



Perhaps from these experiments we may assume that 

 the male seeks out the female and does so by means of 

 the antennae, the removal of which renders him unable 

 to find her. The removal of the antennae of the female, 

 however, does not affect mating. 



Experiment 48.— June 9, 10 :00 A. M. 



1^161. Age 2 days 19:00 hours. Both antennae removed. 



9 153. Age 3 days 18:10 hours. 



(^14.5. Age 4 days 18:00 hours. One antenna removed. 



Object. — To find whether youth or the possession of 

 one antenna will give a male the advantage in mating. 



Results. — June 10, 10:00 P. M. No mating. 



A later experiment proved that the female was not at 

 fault. Hence we may assume that the male with only on6 

 antenna as well as the one without any, was incapable 

 of mating. 



