38 



MISC. PUB. 601, U. S. DEPT. OF AGRICULTURE 



Figuee 34. — Megaloptera. Sialis infumata Newm., an alder fly. Actual length 



about 13 mm. 



MECOPTERA 



Mecoptera (scorpion flies and their allies) are usually winged, the 

 winged members having two pairs of similar wings which are usually 

 rather long and narrow and have several veins. The legs and antennae 

 are long. (See fig. 35.) The mouth parts are formed for chewing. 

 Immature stages are somewhat like caterpillars. These insects are 

 found in moist, shaded woods. The adults are predaceous. The imma- 

 ture stages live in soil litter. 



FlGUBE 35. 



-Mecoptera. Panorpa rufescens Ramb., a scorpion fly. Actual length 

 about 12 mm. 



TRICHOPTERA 



Trichoptera (caddisflies) are soft-bodied insects with two pairs of 

 wings clothed with silky hairs and having a medium number of veins. 

 The antennae are long. The mouth parts of the adults are vestigial. 



