HANCOCK 



13 



or would be mistaken for the tops of seeds of grasses, 

 or parts of plants, especially the leaves of polytrichum. With 

 the genus Tctiigidca, where the eggs are laid deeper in the 



Fig. 3. Tettigidea parvipennis preparing the burrow for the eggs. En- 

 larged about four diameters. 



ground, their extremities, while attenuated, would not be so 

 liable to attack from this source, and are not in consequence 

 so specialized at the cephalic pole. 



CHANGING ENVIRONMENT. 



In the early spring the vegetable mold immediately border- 

 ing rivers is frequented by numerous Tettigids, and while 

 Parateltix cucnllahts remain close to the edge of the streams 

 the year round, Tcttix seem to be forced back farther and 

 farther away as the season's wealth of vegetation comes up 

 and spreads over the river banks. Similarly in swampy 

 meadows in the spring Tcttix and Tettigidea are more easily 

 detected than later on in the season when the wild flora of 

 considerable height then covers the earth. On the other 

 hand, in the late fall some species are taken quite easily; 

 Notnotettix, for instance, which frequent drier sandy soils. 



