CONTENTS 



Page. 



Introduction 5 



Importations of infested nursery stock in 1909-1911 5 



Brown-tail moth nests imported in 1909 5 



Brown-tail moth nests imported in 1910 6 



Brown-tail moth nests imported in 1911 7 



Records of distribution of the imported nursery stock incomplete, 7 



Conditions in the District of Columbia- 8 



Nature of inspection and likelihood of local infestation 9 



Significance of importations of 1909-1911 10 



Effect of the brown-tail moth on health 11 



Character and value of imported nursery stock 12 



European nursery conditions '. 12 



Importation of refuse stock 14 



Necessity of quarantine legislation 14 



Brief description of the different stages of the gipsy and brown-tail moths 15 



The gipsy moth 15 



Description of the different stages of the insect 16 



The eggs 16 



The larva, or caterpillar 16 



The pupa 16 



The adult, or moth 16 



x Seasonal history 17 



How the insect spreads 17 



Damage to plants 18 



The brown-tail moth : 18 



Description of the different stages of the insect 19 



The eggs 19 



The larva, or caterpillar 19 



The pupa 20 



The adult, or moth 20 



Seasonal history 20 



Damage to plants 22 



453 8 





