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The White-scale of the cactus 227 seer. oe 5260 eee eee 129 
The. Elm-treée white-seales .Ji0y i2ta- ees ee tel) eee 129 
The-Eccentric scale of the elim)... 22. ee... a ee eee 129 
Machines for applying insecticides... ..7.%t5a0e.....'. -- a eee eee 130 
Application of wet: insecticides #: 722 So ss eee ee 131 
Application of dry insecticides... iccnaeaee eels.) eee een 136 
WUL-WOTMS isso cies veces beauivud ode cad Ohne Cee ene te Sadr TG 
List of owlet-moths taken on sugar in St. Anthony Park........... 144 
Explanation of illustrations on plates.......... eds hE ae sr 
| Divot: > eaerweeerrrrir ny ys 5 fe Se oa. 153 
