11 



"2^ 



Fig. 4.— Blackhead cranberry worm; a, larva, b and c 

 pupa— enlarged (author's illustration). 



pleted and the moth appears about the 1st of July. The bog at the 



beginning of Jul}^ shows very plainly the effects of the insect's attack 



in brown tips that are everywhere noticeable; and every brown tip at 



this time means a barren upright. 

 Next the leaves drop and the 



burnt appearance disappears 



for a few days, but this is only 



to give wa}^ to another series of 



spun-up tips which resemble 



those of the esbvly brood, but 



with a difference. The vines 



are now in full foliage, full of 



buds and almost ready to 



bloom. Unlike those of the 



first brood, the worms of this 



second brood are not content to 



spin up only a single tip; they 



gather into their web every- 

 thing within reach (fig. 5). 



Two or three sprays with all their buds may be included and every 



chance for fruit destroyed. In fact, the buds, flowers, and very 3'oung 



berries are eaten by 

 preference, and the 

 injury to the crop is 

 out of all proportion 

 to the amount of plant 

 tissue actually de- 

 voured. So, also, in- 

 stead of eating up a 

 leaf entire, the worms 

 take a few bites here 

 and there until, to- 

 ward the end of July, 

 the bog appears as if 

 it had been burnt 

 over, justifying the 

 term "fire-worms" for 

 the insects. 



The egg stage for 

 this second brood is 

 less than a week in 

 length, the larvse 



(worms) mature in about fifteen daj^s, and by the middle of July 



the moths are again out in full force. Egg laying is in full swing 



before the end of the month and these eggs do not hatch till the next 



Fig. 6.— ICxamples of feeding and of webbed uprights (author's 

 illustration.) 



