29 

 LEPIDOPTEKA (BUTTERFLIES AND MOTHS). 



The caterpillars and cocoons of these insects are known to all. The 

 caterpillars differ from the grulis of beetles in that they have on the 

 under side two rows of prolegs— iieshy, wart-like structures that serve 

 to support the posterior part of the body. The injuries caused by 

 these insects are made by the caterpillar. These have biting mouth- 

 parts that nip out tiny pieces of the leaf or wood, which is then 

 chewed and swallowed. The more injurious forms that are liable 

 to be transported on nursery stock may be arranged as follows: 



1. Feeding within tlu- trunk Peach-tree borer. 



Feeding within the twigs or leaf-shoots l\'a('li twig-borer. 



Feeding upon the leaves 2. 



2. The insect covered 1)>- a case .Bagworm, leaf-criimpler, pistol-case bearer, 



cigar-case bearer. 

 The insect not covered by a case _ 3. 



3. Making tents or nests Apple-tree tent caterpillar, fall web worm, brown- 



tail moth, leaf-crumpler, and bnd moth. 

 Without tents 4. 



4. Hairy caterpillars Tussock moth, gipsy moth. 



Bare caterpillars Cankerworms. 



THE APPIiE-TREE TENT CATERPII.LAK. 



( Clisiocampa americana Harr — fig. 19. ) 



Fig. 19.-cmocampa americaim: a. b, caterpillars; c; egg-mass, d, pnpa, e, lemale; /, male. (Riley.) 



The webs or tents of this caterpillar are frequently found on orchard 

 and nursery trees in May and June. The caterpillars use this tent as 



