70 ROYAL SOCIETY OF CANADA 
black. At the lower edge of tubercle 11 there is a white spot. Spiracles 
black, rimmed with white. Thoracic feet paler than venter; prolegs con- 
colorous. 
Length of mature larva 29 mm. 
On the 14th July, six larve changed to pupe. 
Pupa.—Length 12.5 to 13 mm., width 4.2 to 4.5 mm., dark reddish 
brown, shining, pale red in segmental folds of abdomen, and between 
wing and antenne cases; wing-cases and thorax wrinkled; abdomen 
rather coarsely pitted ; cremaster roughened, with two stout spines, which 
are conspicuously curved outwards. 
The first moth emerged in a cool cellar on the 3rd of May, over two- 
weeks earlier than the moths are taken outside at Ottawa. 
Food plant.—The young larve were offered Red oak, Quercus 
rubra, L, and as they took readily to it, they were reared throughout their 
stages on that food plant. 
(Separates issued September, 1907.) 
