314 CONXECTICUX EXPERIMENT STATION REPORT, I907-I908. 



has spread rapidly toward the north and east. In Massachusetts 

 the entire eastern portion is infested nearly as far west as the 

 Connecticut River valley. The insect is reported from Paw- 

 tucket, East Providence and Woonsocket, R. I., though it is not 

 known what portion of the state is infested. The moth has 

 been found in the entire southeastern portion of New Hampshire, 

 even as far north as the White Mountains, and it has spread 

 through the State of Maine into the Province of New Bruns- 

 wick. So far it is not known to us that it has been found in 

 Connecticut. 



Habits and Life History. 



The eggs are laid on the under side of the leaves during the 

 latter half of July, in masses smaller and more elongated than 



Fig. I. — Female brown-tail moth. 



(After Femald.) 



l/i.'iH 



Fig. 2.— Caterpillar of brown-tail 

 moth. 



(After Femald.) 



those of the gypsy moth. They are also more reddish in color, 

 but are covered with hairs in much the same manner, and contain 

 about three hundred eggs each. See Plate XIV, a. 



The eggs hatch early in August, and the young caterpillars 

 feed gregariously upon the upper leaf surface, but soon begin 

 to fasten a number of leaves together with silken threads which 



