126 



INSECTS AFFECTING SHADE TREES, GREENHOUSE PLANTS, 

 DOMESTIC ANIMALS AND THE HOUSEHOLD. 



W. Lochhead, Macdonald College. 



I. — Insects Affecting Shade Trees. 



A. — Feeding on the Leaves. 



B. — Feeding or resting under webbed tents. 



C. — 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 cunea). 

 CC. — 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). 

 BB. — Feeding free on the leaves. 



C. — Adults of moths not white. 



D. — Caterpillars with a broken line of white dots along 

 back, and resting masses on sides of branches and 

 trunks. 

 Forest Tent Caterpillar. (Malacosoma disstria). 

 DD. — Caterpillars with red heads and yellow and black 

 tufts and pencils. Female moth wingless. 

 White-Marked Tussock Moth. (Hemerocampa leucos- 

 tigma. 

 DDD. — Brownish caterpillars with blue and reddish 

 warts; hibernating as egg-masses covered with 

 hair; adult female moth with white wings marked 

 with dark wavy lines, wings of male light brown. 

 Gypsy Moth. (Porthetria dispar). 

 DDDD. — "Measuring Worms" feeding in the day 

 time in spring and early summer. 

 Fall Canker Worm. (Alsophila pometaria). 



CC. — Adult moths white. 



D. — Caterpillars reddish black with only two pairs of pro- 

 legs; with three pairs of small tubercles on back; 

 hibernate as egg-masses of 20—100 on branches. 

 Snow-White Linden Moth. (Ennomos subsigniarius). 



