THE MONTHLY BULLETIN. 



285 



On the morning of ]\Iay 18th the moths that were caught in this 

 particulai- tra]> were soon, and it was estimated that there were from 

 1/200 to 1,500 oi" them. 



Another trap, placed on a heet dump with an electric light to attract 

 the moths, is said to have caught as high as 7,000 moths in a single night. 



Fig. 82. — One of eight large light traps used by the American 

 Beet Sugar Company at Oxnard with much success in attracting 

 cutworm moths. A pan containing oil is placed below the light 

 into wliich great numbers fall and are destroyed. (Original.) 



According to J. E. Graf most of the moths were the common cutworm 

 species, Peridroma saucia. 



The abdomens of many of the trapped females were distended with 

 eggs. — Geo. P. Weldon. 



MISCIBLE OIL SPRAY FOR FRUIT-TREE LEAF-ROLLER. 



{Archips argyrospila.) 



In Vol. II, Xo. 9, of The Monthly Bulletin, the writer published an 

 article on the fruit-tree leaf-roller in which the miseible oils were recom- 

 mended as being very effective in killing the eggs of this pest. The 

 article dealt with experiments that had been conducted in Colorado by 

 Prof. C. P. Gillette and the writer. Since its publication some striking 

 results have been attained in a .small way in California. A supply of 

 egg masses on pieces of bark cut from apple trees was secured in San 

 Diego County. Ten such masses, representing at least 50 eggs per mass 

 on an average, were placed in each of a number of test tubes, the con- 

 tents of some being treated and others left untreated as checks. 



