Ixx THE GYPSY MOTH. 



PAGE 



Davis, Miss R. L., observations on molting 305 



De Courval on tree pruning, 178 



Defoliation of trees, 8-28, 85, 86, 273-284 



Dendrolene, description of, 135 



Dermestes ater, 385 



lardarius, 384, 385 



Des Cars on tree pruning, 179, 186 



Destruction of birds, folly of, 205 



of caterpillars, 58,69,87,126,165 



of egg-clusters. See Egg cluster. 



of gypsy moth, methods for, 117 



of pupa3 and moths, 194 



Destructiveness of the gypsy moth, . . .23, 40, 57, 273-284 



of introduced insects, 250 



Dexter elm, the, 247 



Digestion of birds, 204 



of eggs of the gypsy moth by birds, 239 



Digestive system of gypsy moth, 369 



Diglochis omnivorus, 375 



Dimorphism, sexual, of gypsy moth, 272 



Dill, J. P., statement of 16,26 



Dionychopus niveus, 341 



Diptera, predaceous . . .392 



Dipterous parasites, . 336, 376, 385 



how reared, 386 



Dei, Apelle, on ravages of gypsy moth in Europe, .... 2-79 

 Director of field work, inspection of infested region by, ... 46 



visit to Washington by, . 83 



recommendations of entomologists considered by, . . 69 



report of, to committee, 69 



visit to Amherst by, 46 



Description of different stages of the gypsy moth, . 288, 300, 333, 336 



of dipterous parasites, 387 



Disease among caterpillars 280, 405 



Distance females can assemble males, 240, 351 



travelled by caterpillars, . . . . . . .310 



Distribution of the gypsy moth, 94 



affected by extermination, . ... 113 



affected by food supply, . ... . . . . .95,97 



affected by natural causes, 97 



a study of methods and routes, 106 



as caterpillars, 98 



as eggs, 98, 103, 239 



by animals, 103 



by birds, 98,215,231,235,239 



by man, 99, 100, 103, 106, 278 



by traffic, 102-105, 109, 345 



by travelling of caterpillars, 310 



by wind 98, 278, 301 



compared with that of other insects, 97 



in other countries, 267 



