PROBLEM 10 



35 



of wings and the kind of mouth parts are 

 the guides by wliich we know the orders of 

 insects. 



Bees and Wasps (Hymenoptera, mem- 

 brane wings). — The wings are gauzy and 

 four in number. These insects have stings 



(look at the end of the 

 abdomen) . The mouth 

 parts are too compli- 

 cated for a beginner to 

 use for identification. 



Butt erfli e s and 

 Moths (Lepidoptera, 

 scale wings). — Char- 

 acterized by having two 

 pairs of large wings, 

 covered with tiny 

 bright-colored scales. 

 Head provided with a 

 long proboscis or suck- 

 ing tube which is coiled 

 up when at rest. 



Grasshoppers {Or- 

 thoptera, straight 



wings). — Found on most green weeds. The 

 mouth parts are fitted for biting. Hind wings, 

 if present, are folded up lengthwise under the 

 outer wings when at rest. 



Flies {Diptera, two wings). — Usually small 

 insects with but a single pair of gauzy wings. 

 A short proboscis. 



Bugs {Hemiptera, half wings) . — The wings 



