20 



walls, etc. Remedy: the caterpillars may be jarred off and 

 crushed under foot, or the branch which they infest may be cut 

 off and burned. Spraying with arsenate of lead, 3 pounds to 50 

 gallons of water, is completely effective. 



Tussock Motli (Orgyia). 



Eggs : laid in a white, froth-covered mass on the old cocoon on 

 the bark of elm, horse chestnut, pear and other trees. Larva : ap- 

 pears about June 1st, and when full grown is yellowish gray in color 

 with a red head and with two pencils of black hair pointing forward 

 from the head and a single pencil pointing backward from the tip 

 of the body. There are also four dense tufts of white hair on the 

 back. Cocoon : spun on bark, fences and house walls. Moth : the 

 male is of a chocolate brown color and expands about f inch; 

 female, light gray, spider-like and wingless. There is usually a 

 second brood in late summer. Of the two allied species 0. defini/n 

 covers the egg mass with brownish hair and has a conspicuously 

 yellow caterpillar, while 0. antiqiia lays a naked egg mass and has 

 dark colored caterpillars. The latter species is most common on 

 the apple and the willow. Remedy : creosote, or collect and burn 

 the egg mass in the winter; spray with arsenate of lead, 3 pounds 

 to 50 gallons of water, as soon as the small caterpillars are noticed. 



Imported Elm Leaf Beetle. 



Eggs : laid in June in small, compact clusters on under side of 

 leaf of elm. The egg clusters resemble those of the potato beetle 

 but are smaller and of a lighter yellow color. Larva : the slugs 

 feed almost wholly on the lower side of the leaf, consuming the epi- 

 dermis and leaf tissue. By July 15 infested trees often appear as 

 if swept by fire. When full grown the slugs are about 4- inch long, 

 and are light yellow in color with black markings on either side of 

 the body. Pupce : small, orange colored bodies, found in great 

 masses at base of tree or in rough bark. Beetle : about -^ inch 

 long, dull smoky yellow, with dark bordered wings. A partial 

 second brood occurs in some seasons. The mature beetle hiber- 

 nates under shingles and clapboards of buildings, under rough 

 bark and in various sheltered places. Their early feeding in 

 spring causes the trees to appear as if riddled by shot. Remedy : 

 spray early in June with arsenate of lead, 5 pounds to 50 gallons 

 of water. Use kerosene emulsion, strong soap suds, or hot water 

 on the masses of pup around the base of infested trees. The 

 principal dependence must be put on spraying. 



