29 
LEPIDOPTERA (BUTTERFLIES AND MOTHS). 
The caterpillars and cocoons of these insects are known to all. The 
vaterpillars differ from the grubs of beetles in that they have on the 
under side two rows of prolegs—fleshy, 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: 
HpheecumenGMimetnertrunikes eae See eee 2S ne oh ee 8 Peach-tree borer. 
Feeding within the twigs or leaf-shoots....-..----.---..------ Peach twig-borer. 
LPeceee bimalee? (ay ay ONAN TH) NENT KSEE GeNS pe Pe ee eee ie, 2. 
2. The insect covered by a case.....---- Bagworm, leaf-crumpler, pistol-case bearer, 
cigar-case bearer. 
pe CeU GEN OLEGCOVENEO MID incl CASC a0 a) ets ne oe Ss al Ps ee Se 3. 
3. Making tents or nests. _.-.--..-: A pple-tree tent caterpillar, fall webworm, brown- 
tail moth, leaf-crumpler, and bud moth. 
a MRR TMP ent awe ete ee ae ot ok ne AL wei e eee 4. 
Pesilcuinvacaterpillanswesms Am tee o£ 2) 2 Dee te Ls Tussock moth, gipsy moth. 
Area EN yplil airs) weer) nse eit tac eee ee ts SE ee) Wri 2 Cankerworms. 
THE APPLE-TREE TENT CATERPILLAR. 
( Clisiocampa americana Harr—fig. 19. ) 
Fic. 19.—Clisiocampa americana: «a, b, caterpillars; c, egg-mass, d, pupa, e, female, f, 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 
