42 



Hydrocyanic-acid gas, against San Jose scale, III. 59: XII. 16: XVII, 39. 

 for low -growing plants. XXVI. 60. 

 in greenhouses, XXII, 69; XXVII. 20. 



orchards, a new method of handling. XX. 43. 

 value and use of, IX, 61: XXVI. 34. 

 Hydrcecia immanis. life history of, VII, 40. 

 remedies for, VII, 43. 

 margidens, boring in stems of Cosmos plants, IX. S3. 

 Hylastinus obscurus. work of, in Canada, XXVI, 96. 

 Hylesinus aspericollis, destructive to white alder, XXI, 16. 

 Hylotrupes ligneus, injuring rustic cedar fences, XXX, 91. 

 Hylurgops rugipennis, an enemy of tide-land spruce, XXI. 21. 

 Hylurgus piniperda, injuring pine in Xorway, IX, 80. 

 Hypena humuli, life history of, VII, 44. 

 Hyperacmus tinea?, parasite of Tinea pellionella, IV. 66. 

 Hyperaspis signata, beneficial work of, XXVI, 17. 



feeding on Pulvinaria acericola, XXII. 23. 



innumerabilis, XXII. 12. 

 Hyperchiria io, abundance of, in Louisiana, XVIII, 99. 

 Hypoderas columba? = Falciger rostratus. 

 Hypoderma bovis, structure and characters. V. 95. 

 lineata, life history, V, 98. 



possible case of myiasis by, XVIII. 97. 

 structure and characters, V, 97. 

 Hyponomeuta padi, injuring Prunus in Norway. IX, 80, 



variabilis, injuring Sorbus in Xorway, IX, 80. 

 Hypostena barbata, a parasite of Disonycha xanthomela?na, XIX, 85. 

 floridensis, parasite of Loxostege obliteralis, XXVII, 107. 

 Icerya purchasi, in Portugal, XVII, 30. 



not in the Azores, VII. 87. 

 Ichneumon capitus, parasite of Peridroma saucia, XXIX, 62. 

 comes, parasite of Xoctua c-nigrum, XXVII, 59. 

 maurus, parasite of Peridroma saucia, XXIX, 62. 

 Ichthyura apicalis, on poplar in Ohio, XVII, 99. 

 _Idaho, laws against injurious insects, XIII. 15. 

 Importation of destructive insects, II, 79. 

 Inoculation against insects, II, 16. 

 Insect control, in Riverside, Cal., XXII. 83. 

 Insectary and office methods, XX, 41. 

 Insecticide experiments, some, VI, 30: IX. 60: XXX. 33. 

 Insecticides, spring applications of, on fruit trees. XXVI. 22. 

 Insectivorous birds. VII. 84: XXX, 93. 



attacking the chinch bug, XV. 53. 

 feeding on brown-tail moth, XVII, 28. 

 that attack the Cicada. XIV. 105. 

 habits of lizards, XXII. 96. 

 Insects and the Aveather, XXII, 51; XXX, 63. 

 common names of, IX, 32. 

 fertilizing muskmelons, XVII. 75. 

 from British Honduras. XXX. 82. 

 the Philippines, XXX. 83. 

 Kansas. XXX, 84. 

 injuring binding twine. XXX. 94. 

 injurious in South Africa. IX. 34. 



