OTHER MEMBER.-S UF THE CLASS — INSECTA 183 



on the other hand, are five or six inches long and thicker 

 than one's thumb. 



Fig. 124. — Stalk nf rottoii, shuwin.u tin- rnn (c), larva (a), piipii (5), and 

 adult of the cotton worm moth. 



Flies. — The order, Diptera (two-winged), contains the 

 fiies, gnats, mosquitoes, midges, and others, and is a very 



