a 



Fig. 183. — H. leitcostigma. a, female; b, young 

 larva, magnified ; c, female pupa ; d, male pupa. 

 (After Riley.) 



Liparida: 



A third generation follows in the month of September. This 

 generation lays the eggs from which the larvoe which appear in 

 the following spring are hatched. 



The female, as has already been stated, is wingless, and lives 

 solely for the purpose of oviposition. Having laid her eggs, 

 which she covers with the hairy scales which she plucks from 

 the abdomen, and mingles with a viscid secretion, which she 

 deposits with the 

 eggs, and which on .^^^tf 

 drving becomes hard 

 and brittle, she dies. 

 The young larva on 

 being hatched has the 

 power of spinning a 

 thin thread of silk, 

 with which it lowers 

 itself from its resting- 

 place when disturbed, 

 and by means of which it regains the place from which it has 

 dropped. This power is lost as the insect develops after succes- 

 sive molts. The mature caterpillar is a rather striking and not 

 unbeautiful creature. The head is brilliant vermilion in color; the 

 body is white banded v/ith black, and adorned with black-tipped 

 tufts and bundles of cream-colored hairs. There is considerable 

 disparity in the size of the larvae and the pupae of the two sexes, 

 as is partially shown in Fig. 183. The larva and the pupa of the 

 female moth are generally twice as large as those of the male. 



The best means of combating the ravages of this insect is to 

 see to it that in the fall and winter the cocoons, which may be 



found adhering to the 

 ^ twigs of trees and 



shrubs and secreted in 

 y the nooks and crannies 

 \ of fences, are gathered 

 ' together and destroyed. 



It is also useful to spray 



the young foliage of 



\%^.-H.leiu-ostig,Ha. Larva of female moth, trees which are liable 



(After Riley.) to attack with any one 



307 



