134 



few infested leaves by picking* or cutting- them off and burning 

 them — an operation best done in early spring. A wholesale method 

 of destruction and an effective one is a very thorough spraying 

 of the infested tree in winter with kerosene emulsion diluted with 

 from five to seven parts of water. The tree should be sprayed 

 thoroughly from every side, especial care being taken to reach the 

 terminal buds, for this is where the mites are the most numerous. 

 The same result may be obtained by dipping the trees in a kero- 

 sene emulsion after they are dug from the nursery rows. 



The Tent-catekpillak. 



(^ C/isionim^d anicp'icana. ") 



The twigs of nursery trees are s.^metimes encircled here and 

 there with a thick belt or girdle of cylindrical eg-gs placed side by 

 side with the broad end outward, and covered with a gummy coat- 

 ing v^ig. 20^ which serves to protect 

 them from the weather. The mass 

 thus forined is usually about three 

 quarters of an inch in length and some- 



Fig. 20. The Text-c.\terpil- 

 l,\r; egg-masj: on twig 

 as seen in winter. 



thing- over a quarter of an 

 inch in thickness, but nar- 

 rows towards the end in a 

 way to give it the look of u 

 brown thickening of the 

 twig- itself. These are the 

 eg-gs of the tent-caterpil- 

 lar, two hundred or three 

 hundred in a bunch. They 

 are deposited usually in 

 July, and are consequently 

 to be found at any time 

 during the late summer, 

 fall, or the following win- 

 ter. In early spring the 



Kig. :i. The Tent-c.-vvkki'ii.l.ak : a. \ 

 l3r\ X on nest ; r, egg - mass 

 with gummy covering removed; 

 «/, cocvx^n. 



