LEPIDOPTERA 



35 



bodies of butterflies are slender ; those of skippers are rather stout ; 

 the bodies of moths are typically heavy. 



About 60,000 species are known. In classification among 

 this tremendous number use is made of the markings on the wings, but 

 especially of the veins in the wings. 



The number of families is very large, and injurious species are found in 

 a large proportion of them. Examples are as follows, though this list 

 necessarily is brief and by no means representative of the entire order : 



Fig. 35. — A moth, Automeris. Original. 



Cossidse, the carpenter moths. Larvae bore in the trunks or branches 

 of trees. Pests of shade trees. 



Pyraustida3. The larvae of many species are leaf rollers, and are 

 serious pests. 



Graphohthidae. Adults small. The family includes the codhng 

 moth, the bud moth, and other pests. 



Tortricidae. The larvae usually work within webs. 



Tineina, a superfamily of very small moths, the larvae of which often 

 are leaf miners, but sometimes construct cases within which they feed, 

 as in the case-bearing clothes moths. 



Sesiidae, the clear-wing moths. Larvae often borers and very in- 

 jurious, as the peach-tree borer, the squash borer, and others. 



