36 Trans. Acad. Sci. of St. Louis. 



was found to be again in mating, but the male was head- 

 less. The pair was chloroformed thus for a photograph 

 (PI. Ill), so further notes could not be made upon this 

 experiment. 



Experiment 6. Aug. 18, 7 A. M. A pair in coitu 

 w^ere found in the garden and gently placed in a cage. 

 At 10 o'clock they had severed, but resumed mating at 

 3 :30. At this time a gray female was introduced, and 

 by 7 P. M. the male had left the green female for her. 

 The next morning the male had severed but not dis- 

 mounted; she carried him all day until 5 P. M. when 

 copulation was again resumed. The next day he was 

 only being carried again; he persisted in this position 

 until midday of Aug. 21, when he was devoured. By 

 the following morning the green female had also been 

 devoured by her voracious companion. A new male was 

 at this time placed in the cage with the remaining gray 

 female, but no mating occurred during this or the three 

 "days following, and on the 26th he likewise fell her vic- 

 tim. But the next morning revealed an egg-case made 

 during the night. The female was now left alone until 

 a new mate could be gotten Sept. 1 ; copulation was be- 

 gun promptly that evening and continued throughout 

 all the next day. They separated for a few hours on the 

 3rd, but reunited that evening. On the 4th he was re- 

 jected, and on the 5th he was eaten ; none could be found 

 to take his place. On Sept. 10 the second egg-case was 

 found. The insect lived an uneventful existence hence- 

 forth until its demise on Oct. 6. 



Experiment 7. Aug. 18. The pair mated from noon 

 until 3 :30, and from 5 P. M. of Aug. 19 until noon of the 

 20th, and still a third time on the 21st, from 3 o'clock 

 until night. For the four whole days following the pair 

 was closely observed, but mating did not occur. On 

 the morning of the 25th an egg-case was found, which 

 evidently had been finished only a few hours previously. 

 At 4 P. M. the male was devoured by the female. A new 



