178 



THE MONTHLY BULLETIN. 



liberal application usually make one spraying sufficient for the control 

 of the pest in this State and two are seldom necessary. However, in 

 cases where the first spraying is not sufficient a second application 

 should be made at from three to four weeks later. It is a common 

 practice to combine Bordeaux mixture with the arsenical sprays to 

 control fungous diseases, such as scab, with the one application. 



Natural Enemies. — So far natural control of the codling moth has 

 proven very luisatisfactory. Through Mr. George Compere the State 

 has secured a hymenopterous parasite (Calliephialtes messor), which 

 preys upon the larva^ just after the cocoons are spun. This parasite 

 may be secured from the State Insectary. 



THE CALIFORNIA TUSSOCK MOTH. 



Hemirocdiiipii rvfii><t<i Boisd. (Family Liparidse) . 

 (Figs. 163-165.) 



General Appearance. — The eggs are small, oval, white and are laid 

 in closely woven clusters, usually upon the old female cocoon. The clus- 



FiG. 163.— -The caterpillars of the California tus- 

 sock moth ( Hemerocampa vetusta Boisd.) on apple. 

 (After Volck.) 



ters or egg masses are nearly spherical, grayish brown in color and 

 between one fourth and three eighths of an inch in diameter. The full 



