304 Trans. Acad. Sci. of St. Louis. 



Experiment 65.— June 13, 10 :00 P. M. 



$ 216. Age 6 to 9 hours. 



S 197. Age unknown. One-half of each anteana removed. 



Object. — To again test the mating abilty of a male 

 having one-half of each antenna removed. 



Results.— Suae 16. The pair have been kept together for 3 days 

 without mating. Since this male is one of the strays whose history is 

 unknown it may have already been mated. 



Experiment 66.— June 13, 10 :00 P. M. 



9 214. Age day 6:00 hours. 



c? 207. History unknown. Right antenna removed. 



c? 208. Plistory unknown. Left antenna removed. 



Object. — To see if the absence of left or right antenna 

 will make any difference in mating. 



Results. — No mating whatever.^ 



Experiment 67. — June 15, 8 :00 A. M. 



c?182. Age 4 days 18:30 hours. Right antenna removed. 

 c?lS8. Age 3 days 18:30 hours. Both antennae removed. 

 $ 206. Age 2 days 15:00 hours. 



Object. — In all previous experiments, males in the same 

 mutilated condition have not mated ; this is to test once 

 more their ability. 



Results. — June 18, 8:00 A. M. At the end of 3 days, mating has 

 not occurred.^ 



Experiment 68. — June 15, 8 :00 P. M. 



9 232. 



(^ 229. History unknown. One-half of each antenna removed. 



Object. — To see if the absence of the distal half of each 

 antenna will affect the mating. 



Results. — June 18. After being together for 3 days, no mating has 

 occurred.* 



Experiment 69.— June 15, 8 :00 P. M. 



9 220. Age 1 day 7:30 hours. 



(^ 228. History unknown. Left antenna removed. 



