Rau — Sexual Selection Experiments in Cecropia Moth. 301 

 Experiment 53.— June 10, 10 :00 P. M. 



c?161. Age 4 days 7:00 hours. Antennae removed; tlie in- 

 sect which did not mate in Experiment 48. 



c^l45. Age 6 days 6:00 hours. Left antenna removed; used 

 previously in Experiment 48. 



$ 181. Age day 9:00 hours. 



Object, — To test males lacking one or both antennae 

 for their ability to mate. 



Results. — June 13. After 3 days, mating has not taken place. 



Experiment 54. — June 10, 11 :00 P. M. 



$ 183. 



^ 178. One-half of each antenna removed. 



Object. — To see if the distal half of the antennae of the 

 male is essential for mating. 



Results. — June 11. The pair in copulo. 



Experiment 55. — June 10, 11 :30 P. M. 



9 185. Age day 8:20 hours. 



^ 184. Age day 9 : 00 hours. Right antenna removed. 



Object, — To see if a male with one antenna removed is 

 capable of mating. 



Results. — ^June 11. The pair appear to be mating.— June 18. In 

 my excitement to see if they were actually in copulo June 11, the pair 

 fell to the floor, and if they were, they have never remated, although 

 they have been kept together until the death of the female today. 



Experiment 56.— June 10, 11 :00 P. M. 



$ 186. Age day 6:10 hours. 



cJ 147. Age 6 days 5 : 50 hours. Antennae removed. 



Object. — To test a second time this antennaless male's 

 ability to mate. 



Results. — ^June 13. No mating. 



Since we later found this female perfectly good, we 

 must be convinced of the male's inability to mate after 

 two failures. 



