180 



THE MONTHLY BULLETIN. 



with considerable success in the Pajaro Valley. This is done during 

 the winter months, after the leaves have fallen. Great care must be 

 exercised in getting' all the egg masses, to insure profitable results. The 

 eggs should be destroyed by immersing in oil or by burning. 



When the caterpillars are on the trees great numbers may be removed 

 by jarring. Bands around the tree trunks, such as are recommended 

 for eankerworms, will keep those jarred off from again ascending the 

 trees. In addition to the cotton and tanglefoot bands. Volck recom- 



FiG. 165. — Dead caterpillar of the Califor- 

 nia tussock moth moved to show the pupa 

 cases of internal parasites, which after kill- 

 ing it pupated underneath the dead body. 

 (Original.) 



mends a rope saturated with tanglefoot, or crude oil rich in asphaltum 

 and tied around the trunks, while bands soaked in a mixture of equal 

 parts of pine tar and molasses have given satisfaction. 



Steep earth cones around the bases of the trunks may prove satisfac- 

 tory in keeping the caterpillars from reaching the foliage. 



Natural Enemies. — Mv. B. B. Whitney has succeeded in breeding 

 three distinct hymenopterous parasites from the larvas and pupa*. In 

 addition to these there is the egg parasite {Telenomvs orgym). A 

 dermested beetle also works upon the eggs. The tachina fly (Tachina 

 mella Walk.) preys upon this species and has been bred out in large 

 numbers from the masses of young and pupae. 



