25 



closely resembles the Apple-tree Tent-caterpillar, but does not con- 

 struct a visible tent. It feeds on various species of forest-trees, such 

 as oak, ash, walnut, hickory, etc., besides being very injurious to 

 apple and other fruit trees. The moth. Fig. 17, 6, expands an inch 

 and a half or more. The general color is brownish yellow, and on 

 the fore-wings are two oblique brown lines, the space between them 

 being darker than the rest of the wing. The eggs. Fig. 17, c and d, 

 which are about one-twenty-fifth of an inch long and one-fortieth 

 wide, are arranged, three or four hundred in a cluster, around the 

 twigs of the trees. Fig. 17, a. These clusters are uniform in diame- 

 ter and cut off squarely at the ends. The eggs are white, and are 

 firmly fastened to the twigs and to each other, b}' a brown substance, 

 like varnish, which dries, leaving the eggs with a brownish covering. 

 The eggs hatch about the time the buds burst, or before, and the 

 young caterpillars go for some time without food, but they are hardy 

 and have been known to live three weeks with nothing to eat, although 

 the weather was very cold. 



'ib//^ 



Fig. 18. 



As soon as hatched they spin a silken thread wherever the}' go, 

 and when older wander about in search of food. The caterpillars are 

 about one and a half inches long when fully grown. Fig. 18. The 

 general color is pale blue, tinged with greenish low down on the 

 sides, and everywhere sprinkled with black dots or points, while 

 along the middle of the back is a row of white spots each side of 

 which is an orange yellow stripe, and a pale, cream yellow stripe 

 below that. These stripes and spots are margined with black. Each 

 segment has two elevated black points on the back, from each of 

 which arise four or more coarse black hairs. The back is clothed 

 with whitish hairs, the head is dark bluish freckled with black dots, 

 and clothed with black and fox-colored hairs, and the legs are black, 

 clothed with whitish hairs. 



At this stage the caterpillars may be seen wandering about on 

 fences, trees, and along the roads in search of a suitable place to 

 spin their cocoons, which are creamy white, and look very much like 

 those of the common tent-caterpillar, except that they are more 

 loosely constructed. 

 4 



