20 TETTIGID.'E OF NORTH AMERICA 



HATCHING OF TETTIGIDiE. 



The young, which are always white, excepting the reddish 

 eyes, emerge from a little hole which the first hatched makes 

 by worming its way to the surface. Were we watching the 

 spot from which a new brood was about to make their exit into 

 the outer world, we would see them, one by one, following the 

 leader, coming out upon the ground through a little opening. 

 As if exhausted after a struggle the young larva on reaching the 

 outside lies motionless for a moment. Then vigorously spread- 

 ing the legs and expanding the body, the veil-like amnion is 

 torn open and immediately the little earthly visitor finds a 

 footing on the ground. One after another emerges (each 

 hardly waiting for its predecessor to come out of the opening), 

 and goes hurriedly through the shedding of the amnion vest- 

 ment, which, as we have said before, is folded backward and 

 at last kicked off by the hind tibia. Within a little distance 

 from the hole and encircling it are seen sometimes these 

 vestiges in the form of scarcely visible scattered white specks. 



The young larvpe emerge from the attenuated extremity, 

 or anterior pole, the head being thus directed in the later 

 embryological stages. It more often happens that the 

 ^SS splits lengthwise during the escape of the larva. After 

 breaking through the egg shell and pushing up to the sur- 

 face, the amnion is shed, as above described. From this 

 time on to maturity we have seen individual variations of 

 marking and coloring, as well as differences in structure ema- 

 nating from the same mass of eggs, but this will be considered 

 at greater length further on.* When a few moments have 

 passed all are out upon the ground, having gained a footing 

 and scattered a short distance away. It is at this time it some- 

 times happens an accident befalls one of the new-born, which, 

 though having sufficient strength to come to the surface, fails 

 in its effort to throw off the amnion and thus perishes from 

 exhaustion. Then again it not infrequently occurs that a 

 tardy individual comes out a longer or shorter period after 

 the others. 



*See article by the author on the experimental hatching,' of Faratettix cucttllatus. 

 Trans, .^m. Ent. Soc, XXUI, 241-242, 1896. 



