68 LOWER PTERYGOTA 



sword-shaped and the ovipositors also have a sword-like 

 shape. They are found during the latter part of the summer 

 as adults, occurring on grasses and low vegetation, but 

 seldom on shrubby plants or trees. The females use the 

 long, sword-shaped ovipositor for thrusting eggs into the 

 tissues of plants, and thus they are protected during the 

 winter time. The eggs hatch in the spring and larval devel- 

 opment occurs during the early summer, the adults appearing 

 in the middle or latter part of summer. 



Katydids. — The katydids include several species, but 

 the one most properly called katydid has broad, concave 

 wings with rather prominent veins, quite strongly concave. 



Fig. 33. — Conocephalus enniger, female — natural size. (After Lugger.) 



The name of the species is Cyrtoyhylluvi concavum. They are 

 noted for their song, and sing particularly during the twilight 

 and early part of the night. This species is the best singer 

 of the katydids. Their life history is practically the same 

 as that of Conocephalus. 



A species nearly related to this is the angular-winged 

 katydid, which deposits eggs on the surface of twigs, the 

 eggs overlapping each other like tiles on a roof. 



Stone Crickets. — In this family also have been placed the 

 stone crickets. Most of them are included in the genus 

 Ceuthophilus. Quite a large number of species is included 

 in this genus. They have changed from the food habit of 



