68 SHADE TREES. 



tree, change to yellow pupae and by August 1st have changed 

 to beetles. These feed for a few days and then go into hid- 

 ing, to reappear the spring following. Attack elms only. 



Remedial Measures. 



Spray the infested trees with Paris green, 1 pound in 125 

 gallons of water, or, preferably, 1 pound of dry arsenate of 

 lead in 25 gallons of water, as soon as the first beetle is seen 

 feeding in spring, and soak the leaves thoroughly. The ob- 

 ject is to kill the beetles before they can lay eggs, and there- 

 fore promptness and thoroughness are essential. (See page 

 88.) 



If there has been delay and some eggs are already laid, it 

 will be desirable to spray a second time as soon as larval 

 feeding is observed, and this time every effort 

 prevent ser- must be made to hit the leaves from the under- 

 side, because there is where the larvae feed. 



If, nevertheless, any considerable number of slugs come 

 to the ground to pupate, kill them off with boiling hot water 

 or by sprinkling with kerosene. Cotton batting or sticky 

 bands do no 2;ood. 



THE WHITE-MARKED TUSSOCK MOTH. 

 Plate V., Figs. 2, 2a, 2b, 2c, 2d. 



Winters on the trees in the egg-stage, in a little white mass 

 on the cocoon of the female. Young caterpillars hatch in 

 May and feed on almost all ordinary shade trees. Cater- 

 pillars when full grown have a bright red head, long pencils 

 of black hair fore and aft, and stubby brushes of yellow hair 



on the back. General color yellow with a black 

 various stripe on back. Become full grown toward end 



of June and spin up anywhere on trees, on 

 fences, under window ledges and other shelter on houses. 

 In July the males emerge as dusty gray moths which nutter 



