24 



GUIDE TO INSECTS. 



Table- 

 case 34. 



They live on trees and shrubs, feeding on leaves, but many 

 species eat caterpillars. The wings of many species in their form 

 and coloration closely resemble dead or living leaves. Species of 

 Pterochroa (1252) have the front wing leaf -shape, marked with 

 blotches as if injured by insects or fungi, and the edge has the 

 appearance of having been eaten by a caterpillar. Some allied 



Fig. 22. 



Under side of the base of the wing, 

 showing the full extent of the 

 membrane. 



Under side of the base of the left 

 wing, showing the file used as bow 

 to play on the edge of the right wing. 



Wings of a Long-horned Locust (Macrolyristes imperator), slightly- 

 less than natural size. 



genera (Mimetica, etc.) closely resemble dead leaves. Many kinds 

 are wingless, such as Hetrocles (1245), and many others that live in 

 caves. The males of some of these (Anastostoma and Mimnermus, 

 for example) have very large heads, and have the jaws greatly 

 developed. These are probably used for fighting. The males of 

 Gryllacris (1244), allied winged insects, fight each other furiously, 

 their wings being extended and held erect while doing so. 



