Xll TABLE OF CONTENTS. 



The value for the purpose of some of the more powerful auimal secre- 

 tions, and their chemical production suggested, 75. The result of plant 

 protection from egg-deposit as proposed, 76. Disturbances that might 

 follow such a method of protection, 76. Insect pests not to be extermin- 

 ated, but controlled, 76. Operations of counterodorants in protecting 

 apple-trees, and, similarly, other vegetation, 77. The aim of practical 

 entomology, 77. 



CLASSIFICATION 78 



The importance of elementary knowledge of entomology, 78. Rarely 

 obtainable in our schools, 78. The system of classification usually adopted 

 in the United States, 78. Orders of Hymeuoptera, Lepidoptera, Dlptera, 

 Coleoptera, and Hemiptera — their derivation and typical insects, 78. 

 Orthoptera and Neuroptera — derivation and typical insects, 79. Other 

 orders proposed, and adopted in some systems of classification, 79. 



BIBLIOGRAPHY 80 



Extent to which introduced in the present report, 80. Desirability of full 

 bibliography in Natural Historj', 80. 



INJURIOUS LEPIDOPTEROUS INSECTS. 



Thyridoptekyx EPHEMERyEFORMis, the Bag or Basket-worm . . 81 



Its bibliography, 81. Depredations on Staten Island, 81. The bag or 

 larval case, 81. Insect stages illustrated, 82. The larva and the moth, 



82. The concealed female, 82. Difficulties attending its classification, 



83. DiflFerent names given it, 83. Placed in several families, 83. The 

 original specimen, 83. The original description, 84. Larval food-plants, 



84. Geographical distribution, 84. Its six pai-asites, 84. Pimpla inquis- 

 itor described, 84. Pimpla conquisitor first recorded as a parasite upon 

 it, 85. Hemiteles thyridopterygis, 85, Chalcis otata, where figured and 

 described, 86. Pteromalus, an undetermined species, 86. A Tachiua fly 

 parasite, also undetermined, 87. Remedies, 87. Arsenical poisons, 87. 

 Collecting and destroying the cases the best method, 87. Quantity of 

 cases gathered in a St. Louis park, 87. 



Tolype laricis, the Larch Lappet 87 



Its synonomy and bibliography, 87. Its common name, 88. Mimicry 

 in the caterpillar, moth and cocoon, 88. The species usually rare, 89. 

 Capture of a moth and its oviposition, 90. Descrij^tion of the eggs and 

 their hatching, 90. The larvae in their first stage, 91. In their second 

 stage, 91. The third larval stage, 92. Fourth larval stage, 93. The 

 mature larva, 93 Description of the cocoon, 94. The pupa described 

 and figured, 95. The pupation of the brood, 95. The male moth de- 

 scribed and figured, 96. Female moth described and figured, 97. Sexual 

 difference in the larval moltings, 97. The female has one more molt than 

 the male, 98. Other species having the same peculiarity, 98. Number 

 of broods, 98. Its limited distribution, 98. The species too rare to ren- 

 der remedies necessary, 99. 



Nephelodes violans, the Violet Nephelodes 99 



Its bibliography, 99. Its association with Crambus vulgivagellus, 99. 



