viii CONTENTS. 



Page 



The eggs, 288 



Scattered eggs, 290 



Date of hatching, 294 



A second brood, 295 



The larva or caterpillar, 299 



Feeding habits, 311 



Process of pupation, 332 



The pupa, 333 



Pupation in the field, 335 



The imago, . 336 



Mating, 342 



Habits of flight, 344 



The assembling of the gypsy moth, 345 



On trapping males, 357 



Oviposition, 363 



Parthenogenesis, ... 365 



Internal anatomy, 368 



Natural enemies of the gypsy moth, 375 



Hymenoptera, 375 



Coleoptera, 381 



Diptera, 385 



Hemlptera, 392 



Spiders, 404 



Insectivorous vertebrates, 404 



Vegetable parasites, 405 



Insecticides, 407 



Analyses of poisoned larva, 474 



Effects of insecticides on foliage, . . . . ' 489 



Analyses of insecticides, 492 



Leaf area of trees, 494 



Appendices : — * 



Appendix A, report of a conference held at the rooms of the State Board of 



Agriculture, Boston, Mass., March 4, 1891, iii 



Appendix B, re'sised rules and regulations adopted ])y the State Board of 



Agriculture, xx 



Appendix C, an extract from a description of Section S, Medford, as it appears 

 in the section book, showing the condition of that section and the 

 work done in it in 1891, xxvii 



Appendix D, reports of entomologists who visited the infested region in 1893, xxxii 



Appendix E, reports of entomologists who visited the infested region in 1894 ; 



opinion of the United States entomologist, xliii 



Appendix F, the dangers of arsenical poisoning resulting from spraying -with 



insecticides, lii 



Appendix G, a list of correspondents and observers who have furnished in- 

 formation in regard to the gypsy moth in Massachusetts, . . . hiii 



