INSECTS 



of the grasshopper (A), but usually differs from that of the 

 grasshopper in having the basal joint smooth or hairy all 

 around or with only one pad on the under surface. In most 

 crickets, also, the second joint of the foot is very small. 



Sc R M 



Sc R M 



Fxc. 33. The wings of a tree cricket 



A, right front wing of an immature female, showing norma! arrangement of 

 veins: Sc, subcosta; R, radius; M, media; Cut, first branch of cubitus; Cut, 



second branch of cubitus; lA, first anal. (From Comstock and Needham) 



B, front wing of an adult female of the narrow-winged tree cricket 



C, front wing of an immature male, showing widening of inner half to form 

 vibrating area, or tympanum, and modification ot veins in this area. (From 



Comstock and Needham) 



D, right front wing of adult male of the narrow-winged tree cricket; the second 



branch of cubitus {Cut) becomes the curved file vein (h); s, the scraper 



Some crickets have large wings, some small wings, some no 

 wings at all. The females are provided with long oviposi- 

 tors for placing their eggs in twigs of trees or in the ground 



( Fi g s - 35> 3 6 )- 



The musical or stridulating organs of the crickets are 

 similar to those of the katydids, being formed from the 

 veins of the basal parts of the front wings. But in the 

 crickets the organs are equally developed on each wing, and 

 it looks as if these insects could play with either wing up- 

 permost. Yet most of them consistently keep the right 



[5M 



