Rau — Sexual Selection Experiments in Cecropia Moth. 303 

 Experiment 61.— June 12, 11 :00 P. M. 



9 201. Age day 6 to 9 hours. 



c?189. Age 1 day 9:00 hours. One-half of each antenna re- 

 moved. 



c? 204. Age day 6:00 hours. One-half of each antenna re- 

 moved. 



Object. — To see whether the younger or older of two 

 males, having only half of each antenna will mate. 



Results. — \Tune 13, 8:00 A. M. The female and the younger male 

 204 found in copulo. 



Experiment 62.— June 13, 8 :00 A. M. 



2 151. Age 7 days 17:00 hours. Both antennae removed. 

 c^ 20.5. Age day 15:00 hours. One-half of each antenna 

 removed. 



Object. — To find if a male with only one-half of each 

 antenna will mate with an antennaless female. 



Results. — June 14, A. M. The pair in copulo. 



Experiment 63. — June 13, 8 :00 A. M, 



9 156. Age 7 days 14:50 hours. Both antennae removed. 



(^190. Age 1 day 17:00 hours. 



cf 175. Age 3 days 17:00 hours. One antenna removed. 



Object. — To see if an older, one-antennaed male has 

 any chance to mate in competition with a young, normal 

 insect. 



Results. — June 16. The death of the female occurs after three days 

 without mating having taken place. 



Experiment 64. — June 13, 8 :00 A. M. 



9 181. Age 2 days 19:00 hours. 



(^189. Age 1 day 18:00 hours. One-half of each antenna re- 

 moved. 



(^202. Age day 15 to 18 hours. One-half of each antenna 

 removed. 



Object. — To see if the younger of two males will be 

 more fortunate in mating, when both possess only one- 

 half of each antenna. 



Results. — June 16, 6:00 P. M. The insects have been kept together 

 for almost 4 days without mating. 



