xciv THE GYPSY MOTH. 



PAGE 



Snowdon, W. H., statement of, 13,18,25,30 



Soap powders, use of, as contact insecticide, .... 163, 485 



Soda, arsenate of, experiments with, 143 



Somerville, petition presented by city officials of, .... 36 



Sorauer, Dr. Paul, on tree pruning, 181 



South, Eichard, on extermination of gypsy moth in England, . . 269 



Spain, occurrence of gypsy moth in, 268 



Sparrow, chipping, feeding on gypsy moth caterpillars, 207, 215, 226, 227 



English, attacking the gypsy moth, 208 



English, feeding on gypsy moth eggs, 231,239 



English, introduction of, 233, 234 



Sparrows feeding on gypsy moth, . .... 219,228 



Speyer on distribution of gypsy moth, 267 



Sphinx drupiferarum, 383 



Spiders attacking gypsy moth, 404, 405 



" Spiegel," destruction of, 284 



Spines on wings of gypsy moth, 341 



Spinney, Mrs. F. T., statement of, 12, 18, 29, 32 



Spinning habits of caterpillars, 102, 278, 330, 332 



Spiny area on wings, 341 



Spizella socialis 207, 215 



Spray, burning with oil, 59 



Spraying against gypsy moth, 157 



apparatus, 145-156 



benefit to fruit crops from, 60 



burlapping substituted for 64 



caterpillars distributed by, 113 



caterpillars killed by 57, 58, 64 



danger from (Appendix F) , . . 



distribution lessened by, 64 



poisons for use in, . . . . ... 55,417,477 



not effectual as an exterminative method, 56 



number of moths destroyed by, . . . . . . . 92 



prejudices against, . . . . . . . . 118, 199 



recommended by entomologists (Appendix A), . . . .45,55 



rules concerning (Appendix B). 



system of, 56 



time of, . . 156, 157 



with arsenate of lead, . . . . . . -. . . . 87 



with arsenate of lead, effectiveness of, 80 



with arsenical insecticides, failure of, as a means of extermina- 

 tion, . 62 



with contact insecticides, 67 



with Paris green. See Paris green. 



with Paris green, opposition to, 56 



outfits, 55, 140 



Spread of gypsy moth, comparison with that of canker worm, . 97 



efforts to prevent the, 79 



in twenty years, 5 



in woods, 115 



slow, 245 



