AGRICULTURAL EXPERIMENT STATION. L66 



shown in Fig. 8 a. Fig 8 b shows one of the cocoons enlarged. 

 The specimens we had were confined in a box and the cocoons were 

 attached to the leaves and side of the box. If it can be shown that 

 in nature the cocoons are never attached to the leaves it would 

 indicate a remarkable instinct, for if attached to the leaves which 

 fall they would probably be destroyed, while attached to the twigs 

 they would be safe during the winter. The cocoons contain the 



Chrysalis which is dark brown, rough, punctured on the back, 

 twelve hundredths of an inch long. When ready to transform the 

 chrysalis works itself partly out of the cocoon and the moth comes 

 forth. 



Perfect insect a small moth that is only about one-fourth inch 

 expanse of wings. Fore wings whitish tinged with pale yellow 

 and dusty brown. On the middle of the inner margin is a conspic- 

 uous oval brown spot. A wide streak of the same color on the 

 opposite margin which extends nearly to the end of the wing where 

 it tapers and points to a small circular brown spot near the tip. 

 The moth much enlarged is shown in Fig 8 c. The hair lines to 

 the right show the natural size. 



LIFE HISTORY. . 



This insect spends the winter in the chrysalis state in the cocoons 

 usually attached to the twigs and branches of the host plant. There 

 is reason to believe that the larvae when full grown sometimes 

 desert the host plant and form their cocoons on other plants close 

 by. About the time the leaves unfold the moths come forth and 

 lay their eggs upon the tender foliage. The larvae are full grown 

 in July. The specimens sent us in July were in the larval form 

 and went into the chrysalis state in August and have not yet (Jan- 

 uary) emerged, which would indicate only one brood in Maine. 

 Prof. Riley thinks there are two or three broods in the latitude of 

 St. Louis. Mo. In the latitude of New York, Prof. Lentner states 

 that there are two broods, one in July and one in September. Our 

 specimens would belong to the July brood and possibly may be 

 diseased and may not emerge. Possibly we have two broods in 

 Maine. In September or October the cocoons are formed in which 

 the pupoe spend the winter. The larvae feed externally upon the 

 foliage, at least the leaves we received had the upper epidermis 

 and pulp eaten away in patches, the veins and lower epidermis 

 intact. 



