110 



Gilead, beech, birch, oak, willow, poplar, wisteria, poison ivy, chest- 

 nut, catalpa, holly, Norway spruce, arbor vitae, corn, grass and 

 clover. 



It has a wide distribution in the old world, and is said to feed there 

 upon nearly all the plants mentioned above, and also upon apricot, 

 lime, pomegranate, hornbean, hazel, larch, azalea, fir, myrtle, rose, 

 cabbage and many others. 



Habits of the Moth. 



The female moth, Plate I, figs. 1 and 2, does not fly readily, and 

 only in an obliquely downward direction, so that the chances of rapid 

 distribution in this stage are small. The males, plate I, figs. 3 and 

 4, fly mostly during the day, and not later than 10 o'clock in the 

 evening. The_v are not attracted to lights, and as their mouth parts 

 and digestive system are undeveloped, they do not eat in this stage 

 of their existence, and therefore cannot be attracted to fires nor traps 

 baited with liquid food. 



The females move about but little after emerging from the pupa 

 cases, and they frequently mate with the other sex within half an 

 hour after they emerge, although it requires from one-half to three- 

 quarters of an hour for their wings to expand fully. They begin to 

 lay their eggs in about two hours, and it requires about two hours 

 and a half to complete this act. 



Date of Laying Eggs. 

 The date of laying the eggs varies a great deal owing to the differ- 

 ence in time of the emergence of the moths. The earliest date 

 recorded last year was July 7th, and the latest was Sept. 28th, but 

 by far the greatest number were laid about the middle of July. The 

 development goes on within the egg during the summer and autumn, 

 so that fully formed caterpillars are found in the eggs in the fall ; 

 but they do not hatch until the following spring. 



Date of Hatching of the Eggs. 



The eggs hatch from about the 20th of April to the middle of June, 

 according to their location; those in warm, sunny places hatching 

 early, while those in cool places, as under stones, hatch later in the 

 season. The yourfg caterpillars remain on the egg mass about twen- 

 ty-four hours before beginning to eat the leaves of their food plant. 



When the caterpillars are about half-grown, they become gregarious 

 in their habits, feeding by night and resting in clusters during the 



