184 



THE MONTHLY BULLETIN. 



Distribution. — Throughout the entire State, ])iit more abundant in 

 the Sierra foothills and in the Sacramento and San Joaquin valleys. 



Food Plants. — This species attach a great variety of both wild and 

 cultivated trees and shrubs. Prune trees have often been severely 

 attacked, the young larvae destroying the first appearing buds. 



Fig. 170. — The brown day moth (Pseudohazis eglanterina Boisd. ). Larva covered 

 WiL.x cocoons of an internal para-site and the adult male. (Larva after U. S. Dept. 

 Agrcl. Adult original. Cal. Hort. Com.) 



Control. — The egg masses are very conspicuous and great numbers 

 of them may be easily destroyed by hand piclving in the spring. 



Arsenical sprays applied when the larvns become apparent are also 

 effective. 



Natural Enemies. — Internal humenopterous parasites perform a very 

 important role in checking the ravages of this pest. Caterpillars are 

 often found wnth the cocoons of these parasites attached to the bodies 

 as shown in Fig. 170. The eggs are also destroyed in large numbers 

 by small parasites. 



