TABLE OF CONTENTS TO REPORT IV. 29 



Page. 

 Silkworms Continued. 



THE CECROPIA SILKWORM. 



coon, 105 The moth immediately after hatching, 106 The- egg, 106 

 - Description of the larval changes, 106 Strange habit of birds of 

 using the empty cocoon as a storehouse, 107 The Cecropia worm can- 

 not be classed as an injurious insect, 107 Samia Columbia ought to be 

 considered a variety of cecropia, 107 Parasites, 107 The Long-tailed 

 Ophiou, 107 ; its mode of ovipositiou, 108 ; habits of its larva, 108 The 

 Cecropia Tachina-fl y, 108 ; how it affects its victim, 108 ; its larva 

 and imago, 109 The Mary Chalets-fly, 109; how it escapes from the 

 cocoon of the inoth, 109 ; description of the imago, 110 The Cecropia 

 Cryptus, 110; its habits, 110; description of the two sexes, 111; how 

 it differs from the allied species, 111. 



THE ALIANTHUS SILKWORM 112 



Difference between the silkworms of the Castor-beau and Ailauthus, 112 

 Introduction of the Ailanthus silkworm into Europe, 113 Ailanthicult- 

 ure in Europe, 113 Its introduction into America, 114 Disadvantages 

 of the Ailauthus silkworm, 115 Its acclimatization in America and Aus- 

 tralia, 115 Value of the cocoon, 115 Mr. Forgemol's device for un- 

 winding the cocoon, 116 Natural history of the Ailanthus silkworm, 

 117 The egg and mode of egg-laying, 117 Larval changes, 117 

 Pupation, 118 The imago and its variations, 118 Food plants, 118 

 Directions for raising the worms, 119 A good word for the Ailanthus 

 tree, 120. 



THE PROMETHEA SILKWORM 121 



Value of the cocoon, 121 Mode of egg-laying, 121 Larval changes, 121 



How the cocoon is fastened to the twig, 122 Striking sexual differ- 

 ence in the moth, 122 CaUosamia anguUfera ought not to be considered 

 as a different species, 122 Food plants of the worm, 123 Natural 

 enemies, 123. 



THE LUXA SILKWORM 123 



The beautiful appearance of the moth, 123 The cocoon, 124 Food- 

 plants, 124 Larval changes, 124 Season when the imago issues, 125 



No parasites of the worm known, 125 Actias selene probably identi- 

 cal with luna, 125. 



THE POLYPHEMUS SILKWORM 125 



Mode of egg-laying, 125 The egg, 126 Food- plants, 126 Larval 

 changes, 126 The cocoon, 126 Mr. Trouvelot's account of the issuing 

 of the moth, 127 Wonderful vitality of the chrysalis, 127 Characters 

 of the moth and its variations, 128 The broad antennae of the male 

 moth mistaken for a third pair of wings, 128 Difficulty of reeling the 

 cocoon, 129 Number of annual broods, 129 Parasites, 129.' 



THE YAMA-MAI SILKWORM 130 



Its native home and food-plant, 130 Its introduction into Europe and 

 Australia, 130 Attempts at raising it in America, 130 The egg and 

 how it should be kept over winter, 131 Climate most favorable for the 

 worm, 131 The worm and its resemblance to the leaf, 132 Food 

 plants, 132 Larval changes, 132 The cocoon and the value of its silk, 

 133 The moth and its habits, 1?3 Difficulties of rearing the worm, 

 133 Mr. Adams's account of rearing the Yama-mai Worm in Japan, 134 

 The Uji parasite, 136. 



THE PERNY SILKWORM 137 



Its native home, 137 How it differs from the preceding, 137 Larval 

 changes, 137 The cocoon and its silk, 137 The moth, 137 Its cul- 

 ture in China, 138 The Tusseh Silkworm, 138. 



