General Index. 



Y31 



Crambus — {Continued). Bulletin 



Economic importance of '• 



General characteristics of 



Habits of 



Methods of study of 64 



Preventive measures 



Apphcation of ashes, lime, etc 



Burning 



Deep plowing 



Rolling the ground 



To prevent injuries to cultivated crops 



Trap lanterns 



Structure of the external reproductive organs 



Synopsis of species 



Synoptical table of 



Time of flight of, at Ithaca, N. Y 



Venation of the wings of 



Cultivated poplars 



Compendium of 



Cultivated species 



Populus alba , 



var. Bolleana 



var. canescens 



var. nivea 



Populus angustifolia 



Populus balsamifera 



var. intermedia 



var. latifolia 



var. viminalis 



Populus candicans 



Populus grandidentata 



Populus laurif olia 



Populus monilifera 



Populus nigra 



var. Italica 



Populus Sieboldi 



Populus Simonii 



Populus tremula 



Populus tremuloides 



General remarks , . 



Cottonwood 



Populus Bolleana 



Populus Certinensis 



Populus elegans 



Populus tremula 



Populus tremuloides 



Russian poplars in the northwest 



Index to synonyms 



