INDEX. Ixxi 



PAOE 



Distribution of the gypsy moth, peculiarities of, . . . . 98, 99 



period of greatest, 104 



primary, 104 



relation of population to, . .... . . . 99 



results of study of methods, 107 



secondary, 104 



District infested by gypsy moth. See Infested region. 



Dohrn, Dr., on parthenogenesis, 366 



on vitality of larvae, . . . . 278 



Donitz on singing Lepidopteron, 341 



Donovan on occurrence of gypsy moth in England, . . . .268 



Douglass and Scott on breeding Heteroptera, 394 



Dovvd, Mrs. John, statement of, 22 



Downy woodpecker attacking the gypsy moth, .... 207, 221 



Drassus sp. attacking the gypsy moth, 405 



Drew, C. It., statement of, ......... 59 



Dryobates pubescens. See Downy woodpecker. 

 villosus. See Hairy woodpecker. 



Dryocampa rubicunda, 402 



Dubois on ravages of the gypsy moth in Belgium, . . . .279 



E. 



Ebermayer, Dr., on birds v. the gypsy moth, 209 



Eck raupenleim machine, 133 



Effects, injurious, of arsenic (Appendix F), .... 161,162 



of extermination on distribution, 113 



of insecticides on foliage 159, 489 



Egg-clusters of the gypsy moth, advantage of destruction of, 84, 117, 284 



age of, how determined, 95 



comparison of number destroyed annually, 93 



destruction of, 63, 117 



destruction of, in Europe, 284 



distribution of, by streams, 98 



how laid 363 



number of caterpillars from, . . . . . . 94, 297 



number destroyed in 1891, . . . ^ . . . . . 54 



of unfertilized females, . . . ' . . . . 290, 367 



old distinguished from new, . . .... . . 95 



size of 289 



treated with acids, . . . '.' . . 63,123,413,415 

 treated with creosote, . . . . . . . 63,123,410 



where found, 98, 126, 289 



Egg-feeding birds, value of, . . . . . * . " . . 229 



Egg-gathering and fall inspection, . . ... . . 60 



Eggs of the gypsy moth, birds which may eat, . . . . 228, 229 



burning of, 57,119,284 



danger from transportation of , . . . . . . . Ill 



description of, . . .... . . . .288 



destruction of, ... . 85, 39, 53, 63, 69, 78, 84, 125, 195 



distributed by birds, . -.' . . . . . . 230,239 



