VI TABLE OF CONTENTS. 



Chapter XVI. 



Page. 



Insects injurious to the spruce 811 



Aflfecting the trunk aud branches, rill— Aifecting the leaves, 830— Affecting 

 the cones, 854 — Other insects of the spruce, 856 — Insects injurious to the 

 Rocky Mountain spruce and Douglass spruce, 857. 



Chapter XVII. 



Insects injurious to the fir tree 861 



Affecting the trunk, 861 — Affecting the leaves, 862 — Other insects of the 

 fir, 869. 



Chapter XVIII. 



Insects injurious to the hemlock and larch 871 



Injuring the trunk, 871 — Affecting the leaves, 873. 



Insects injurious to the larch or tamarack : Affecting the leaves, 879— Other 



insects, 903. 



Chapter XIX. 



Insects injurious to the juniper 904 



Affecting the trunk, 904 — Affecting the leaves, 907. 

 Insects injurious to the common juniper, 910. 



Chapter XX. 



Insects injurious to the cedar and cypress 917 



Insects injurious to the cedar, 917. 

 Insects injurious to the cypress, 921. 

 Insects injurious to the Sequoia gigantea, 922. 



Explanations to plates 923 



Indices of insects, plants, and authors quoted 929,947,953 



