IDENTIFICATION OF INSECTS INJURIOUS TO CROPS 87 



(e) Twenty-legged grubs eating holes in the leaves. — Strawberry Saw fly 

 {Entphytiis maculatus) 

 Fruit: 



(a) Caterpillars feeding on the berry. — Stalk Borer (Papcipertia nitela), p. 196. 



(b) Minute black bugs producing a buggy odor when eaten with berry. — Flea- 

 like Negro Bug {Corimelana pulicaria), p. 167. 



(c) Flower buds drooping and bending over. — Strawberry Weevil (Anthonomus 

 signatus), p. 332- 



(d) Fruits deformed to "buttons. " — Strawberry Thrips (Euthrips Irilici), p. 122. 



XVII. INSECTS AFFECTING SHADE TREES 



(Consult Insects Affecting Park and Woodland Trees by Felt) 



(a) Feeding on the leaves. 



(b) Feeding or resting under webbed tents. 



(i) Hairy yellowish-brown and black marked caterpillars feeding 

 on leaves within webbed tents in July-Sept.; adult moths white 

 or black-spotted. — Fall Web Worm {Hyphantria cimca), p. 181. 

 (2) Hairy black caterpillars, white stripe along middle of back, lateral 

 white and yellow line with blue spots. Resting in silken webbed 

 tents at angles of branches. — Orchard Tent-caterpillar {Malacosoma 

 americana), p. 203. 

 ^bb) Feeding free on the leaves. 

 I. Adult mothsnot white. 



(i) Caterpillars with a broken line of white dots along back, 

 and resting in masses on sides of branches and trunks, not 

 within webs. — Forest Tent-caterpillar {Malacosoma disstria), 

 p. 204. 



(2) Caterpillars with red heads and yellow and black tufts and 

 pencils. Female moth wingless. — White-marked Tussock Moth 

 {H enter ocani pa leucostigma), p. 202. 



(3) Brownish caterpillars with blue and reddish warts; hibernat- 

 ing as egg-masses covered with hair; adult female moth with 

 white wings marked with dark wavy lines, wings of males 

 light brown. — Gipsy Moth {Porthetria dispar), p. 200. 



(4) "Measuring worms" feeding in the daytime in spring and 

 early summer. — Fall Canker Worm {Alsophila pometaria), 

 p. 205. 



(5) Caterpillars with tufts of white, black, or yellow hairs, and 

 pencils of black or orange or white hairs. Feeding on hickory, 

 butternut, etc. — Tiger Moths (Halisidota spp.), p. 183. 



(6) Caterpillars with sharp pale yellow hairs and with a pair 

 of long black hair pencils on the first and third abdominal 

 segments, and a single one on the eighth. Feeding on elm, 

 maple, hickory, oak, ash, poplar, etc. — American Dagger Moth 

 {Acronycta americana), p. 198. 



