36 



HOW INSECTS ARE CLASSIFIED 



Notodontidse. Larvae large and usually feed exposed. Examples 

 are the yellow-necked and the red-humped caterpillars. 



Geometridse. Parents of the " measuring-worms." 



Noctuida?. An immense family. The moths fly at night. The 

 larvae include many of our worst insect pests, such as the army worm, 

 cotton boll-worm, and cutworms. 



Lj^mantriidse, the tussock moths. 



Sphingidse, the hawk moths. Large insects. Larvae conspicuous. 

 Example, the tomato worm. 



Saturniidae, the silkworm moths. Larvae large and armed with 

 tubercles or spines. 



Lasiocampidae. The larvae often construct large nests, as the tent 

 caterpillar. 



Pieridae. A common family of butterflies, including the imported 

 cabbage worm. 



Hymenoptera 



The order Hymenoptera includes the bees, ants, wasps, sawflies, and a 

 host of parasitic species, many of which are extremely minute. 



Metamorphosis is complete. The larva is grublike or wormlike. 

 Often the pupa is inclosed in a cocoon. 



Fig. 36. — A sawfly. Enlarged and natural size. Original. 



