The worms grow rapidly during late May and June and mature early in July. 

 After their first stages are past they are as follows (Plate Four, fig. 8): 

 The head is mostly sooty back, this color being much broken up by irregular 

 light yellow markings, and has a long triangular stripe down the middle of 

 the face and two converging curved lines on the top that are cream'colored 

 and conspicuous. Its surface bears many yellow hairs. The under side of the 

 body is mostly yellowish. The back and sides are rather dark brownish gray, 

 with a light line along the middle of the back. There are eleven prominent 

 tubercles in a row along each side of the back, the first five being blue and 

 the last six red. These bear slender black spines and a few short pale yel- 

 low hairs. Tubercles on the sides have more and longer hair most of which 

 is pale yellowish. Two small bright red tubercles without hair or spines, 

 some distance apart on the mid-line of the back toward the hind end, and a 

 conspicuous dark hairy tubercle on each side just behind the head are dis- 

 tinctive. The female worms often get to be two inches long, but the males seldom 

 much exceed an inch. 



The caterpillars spin much silk in their first stages and commonly drop and 

 hang by a thread when disturbed. They do not do this when they get larger, 

 but they spin a few threads for support before pupating and often make a scant 

 cocoon. 



In their first stages, the worms lemain sheltered at night and feed in the day- 

 time, usually being most active from 9 to 11 A. M. and from 3 to 5 p. M. 

 Their habits change as they grow and they feed mostly at night, remaining inactive 

 and more or less concealed during the day unless they are starved. 



THE PUPA 



Pupation usually becomes general toward mid-July on the Cape, but some 

 caterpillars remain till August. When the worms abound they commonly col- 

 lect in masses to pupate. The male pupae are from three-fifths to four-fifths 

 of an inch long and the female from three-fifths of an inch to ohe and two-fifths 

 inches. They are deep brown and bear considerable yellow hair (Plate Four, fig. 

 9). They usually are found on the sand on cranberry bogs, often covered with 

 litter, but they also occur up among the vines. The pupal stage lasts 7 to 17 days. 



THE MOTH 



The sexes are very unlike. The male (Plate Four, fig. 10) expands about 

 an inch and a half. Its antennae are bushy and, with the upper side of the 

 body and wings, are dingy brown, the forewings having irregular dark brown 

 markings. The head and under side of the body are yellowish white. All the 

 wings are light brown underneath. 



The female (Plate Four, fig. 11) expands about two inches. Its antennae 

 are dark brown and much less bushy than the male's. The hind end of the 

 abdomen is dingy reddish brown. The rest of the body and the wings are 

 nearly white. The forewings are marked irregularly with different shades of 

 brown and all the wings have dark brown spots at regular intervals along their 

 outer margins. 



The moths emerge in late July and August. The males are slender-bodied 

 and fly actively by day with a peculiar zigzag flight, but the females are heavy- 

 bodied and sluggish and cannot fly. 



How Bogs Become Infested 

 Bogs become infested in the four following ways: 



1. By the Hatching of Eggs laid on the Bog the Tear Before. — This is a 

 common cause of trouble on bogs that have been neglected, especially dry bogs. 

 These infestations usually defoliate rounded areas. 



2. By Wind Drift of the Worms in their First Stage. — This is the main 



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