INDEX. . ixxxvii 



O. 



PAGE 



Oak attacked by gypsy moth in Europe, . . . 274-277, 281-283 



leaf, area of, _ 495 



Obstacles to extermination, . . . . . . . . 245 



Ochsenheimer, " Schmett. v. Europa," . . . . . 255 



Ocneria dispar, . . . . . . . . 255 



act to provide against depredations by, . . . . . 47 



See Gypsy moth. 

 Ocneria rnbea, peculiar structure on fore wings of, . . . . 342 



studies on, 256 



Odoriferous glands of bugs, . . ..-.-. . . 394 



Oil, creosote, for destroying eggs, 63, 123, 410 



hose, . . . .120 



parafflne gas, used for burning, 120 



paraffine gas, used on eggs, . . 417 



rape, with tar for banding trees, 285 



spray, burning with, 59 



Old World, injuries of gypsy moth in, 273 



Orchards attacked by gypsy moth, 274 



extermination of moth in, 248 



Orenboorg, ravages of gypsy moth at, 280 



Organization of committee, 38, 49 



of field force, 50 



of second commission, 45 



Orgyia definita, influence of environment on, 273 



leucostigma, . 402 



compared with gypsy moth 272 



destroyed by spraying, . . . . . . . .140 



increase due to English sparrows, . . , . . . 235 

 Oriole, Baltimore, attacking the gypsy moth, . . 6, 213, 225, 227, 237 



Osborn, Prof. Herbert, identification of mites, 404 



Outbreaks of the gypsy moth checked by birds, .... 205 



of the gypsy moth in 1889, ....'... 10 



Oven bird attacking the gypsy moth, . . . . . . 208, 219 



Oviposition of gypsy moth, . . . ... . . . 363 



Ovipositor of gypsy moth, . . . . . . . .342 



P. 



Packard, Dr. A. S. , infested region visited by, 69 



report of (Appendix D). 



Paint and creosote tube, 124 



for use in marking trees, 51, 124 



for use on wounds on trees, 178 



town section bounds marked with, 50 



Palsacrita vernata, 402 



food plants of the, 97 



Palpi, labial, used in spinning, 332 



of imago, 339 



