Ixxviii THE GYPSY MOTH. 



Gypsy moth, introduction of into America by Leopold Trouvelot, . 3 

 introduction of, recorded by Professor Fernald, .... 3 



Japanese, size of, 338 



males. See Male moth. 



means of preventing spread of, caterpillars, .... 63 



means taken to find new colonies, 105 



migration of, in search of food, 13, 97 



natural enemies of, . . : . . . .6, 95, 203, 375 



number of, colonies exterminated, . . . . . . 70 



number of, destroyed by fire, . , 92 



number of, destroyed by spraying, 92 



number of eggs deposited by, 94 



numbers of, in populated districts, 99 



origin of isolated colonies, 103 



outbreak of, in 1889, 10 



parasites of, 57, 96, 375, 385 



peculiarities of the distribution of, 98, 99 



period of greatest distribution, 104 



plants destroyed by the, 70, 318 



possible spread of, 250 



pupae. See Pupje. 



rapid development of, 86 



ratio of increase of, 95 



ravages of, first noticed, 32 



result of the transportation of, 102 



seasons favorable for the increase of, 95, 96 



second brood of, 86, 295 



secondary distribution of, . . . . . . . .104 



spread of, compared with that of canker worm, .... 97 



statements from citizens concerning escape of, .... 4 



study of the distribution of , . . -. . . . . 94 



swarming of the male, . . . ... . . 86 



systematic position of , . . . ' . . . . . . 256 



v. English sparrow, 234 



weather favorable for the increase of, . . " . . . 84 



H. 



Habia ludoviciana, . . . . ... . . .207 



Habits, feeding, of gypsy moth caterpillars, 311 



of flight of gypsy moth, 344 



of the gypsy moth, observations on the, 87 



spinning, of gypsy moth caterpillars, .... 279, 330, 332 

 Hair deposited by the gypsy moth in laying, .... 342, 3(54 



Hairs, aerostatic, of caterpillars 301 



Hairy caterpillars, immunity of, from birds 208, 210 



covering of nests, 289 



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



Hamlin, Mrs. I. W., statement of, 11, 20, 30 



Hand-killing of caterpillars, efficiency of, 64 



Harlow, J. W., statement of, 25, 28 



