PROBLEM 10 



35 



of wings and the kind of mouth parts are 

 the guides by which 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. 



Butterflies 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 



