EXPERIMENT STATION BULLETINS. 



299 



The sexes differ greatly, the female being wingless and the male winged. The 

 female is a swollen creature with weak powers of locomotion. She emerges from 

 the cocoon, meets the male, deposits a batch of eggs in a white, frothy mass on 

 the side of the cocoon and dies. The winter is passed in the egg stage. We 

 probably have hut one brood in Michigan, although in the South there are said 

 to be two broods. The damage inflicted by these tussock-moths often is severe 

 both to fruit trees and to shade trees. 



REMEDIES. 



Paris-green applied in the ordinary way, will kill the. larva? or caterpillars. 

 Hand picking or burning the cocoons is really practicable in this case, as the 

 cocoons are fairly conspicuous owing to the frothy mass of eggs thereon. Cotton 

 bands such as are used for the canker-worm, will keep the caterpillars out of 

 trees previously cleared by hand picking. 



Fig. 17. — Tussock-motli, aftt r Howard, Div. of Entomo'.ogy, Dept. of Agriculture. 



The Palmer Worm. {Ysolopus pometellus.) 



An insect little known among the fruit growers, is the palmer w^orm. Appear- 

 ing as It does, at long intervals of time, one hardly gets acquainted with it before 

 it is gone, leaving no word as to when it may be expected again. Tlie explanation 

 for its sudden multiplication into great armies, from comparative obscurity and 

 the subsequent relapse into rarity is hard to make. Suffice it to say that at inter- 

 vals of perhaps fifty years, more or less, the pests appear and worlc great havoc 



