i8o TETTIGID.E OF NORTH AMERICA 



started at 3:55 p. m. (June 28), removing her ovipositor at 4:25 p. m. The 

 egg-mass contained seventeen eggs. 1 subsequently discovered seven larvae 

 which had hatched in the jar containing this female, which were her brood. 

 From these accounts forty-five eggs have been laid by this female, and 

 as subsequent observation determined, the eggs were all fertile. 



TETTIGIDEA PARVIPENNIS HATCHES IN FOURTEEN DAYS- 

 WEATHER WARM. 



Tettigidea parvipennis eggs laid June 22 hatched to-day, making incu- 

 bation fourteen days. There were twenty-one eggs in the egg-mass. The 

 weather has been unusually warm, favoring hatching. July 6, igoi. 



TWEXTY-SIX EGGS LAID BY TETTIGIDEA PARVIPENNIS 



JULY g. 



At 7 p. m. a specimen of Tettigidea pijrTipe/i/u's'oviposhed. On taking 

 these eggs up the following morning for embryological preparation, I found 

 twenty-six eggs constituting the egg-mass. This is the largest number that 

 I have observed laid by this species at one time. July 9, 1901. 



TETTIGIDEA PARVIPENNIS LAYS SIXTEEN EGGS JULY 8. 



Tettigidea parvipennis laid sixteen eggs in vivarium to-day. July 

 8, IQOI. 



NINETEEN EGGS LAID r>Y TETTIGIDEA PARVIPENNIS JULY 10. 



Nineteen eggs constitutes an egg-mass laid by Tettigidea parvipennis 

 to-day. July 10, igoi. 



POSITION OF THE MALE POSTERIOR FEMORA DURING COUP- 

 LING OF SEXES PECULIAR, IN TETTIGIDEA. 



During conjugation of Tettigidea parvipennis, when the male rides 

 around on the female's back, the posterior legs are frequently drawn up at 

 the sides with the tibia; close to the femora, then standing almost perpen- 

 dicular to the body. 



THE MALE TETTIGIDEA PARVIPENNIS GRASP OF THE 

 FEMALE — HIS CONVULSIVE ACTION DURING AND BE- 

 FORE COITUS. 



The peculiar convulsive spasm or orgasm which I observed in the male 

 Tettigidea before coitus had taken place, was afterwards observed while 

 the pair were coupled. This performance of the male probably shows each 

 time there is an emission of spermatozoids. The male appendages grasp 

 the sharp edge of the last abdominal segment underneath the ovipositor 

 of the female during coitus, requiring enormous extension of the male's 

 abdomen. His hind legs are drawn up, not taking any hold whatever, his 

 grasp being dependent on the first and second pair of legs. June 12, 189S. 



