Bui. 117, Bureau of Entomology, U. S. Dept. of Agriculture. 
Plate IV. 
Fig. 1.— Sweet Peas Infested by the Red Spider, but Protected by Dusting, at 
Intervals of One Week, with Precipitated Sulphur. Los Angeles, Cal., 
1910. i Original.) 
Fig. 2.— Sweet Peas, Growth Aborted, Blossoms Indifferent, and Vines nearly 
Killed by the Red Spider. Los Angeles, Cal., 1910. (Original.) 
THE RED SPIDER ON SWEET PEAS. 
