EXPERIMENTAL WORK WITH CRANBERRIES. 51 



concerning this insect were obtained from Mr. Ellis, the foreman of the 

 bog, wiio seemed to be a very good observer: — 



The first worms of this insect were found on the bog on June 25. They were then 

 very small. Unhatched eggs were also present in abundance on June 25. Small 

 worms were seen in numbers spinning down the vines and hanging by small silken 

 threads. Most of the moths had disappeared by June 18. The eggs on the vines 

 were yellow and laid in scattering small batches (three to five together). The 

 worms worked first on the backs of the leaves. On June 15 the female moths were 

 more numerous and were scattered more widely over the bog than they were on 

 the 13th, but the males were much less numerous on the 15th than they had been on 

 the 13th. Females full of eggs were abundant on the 15th. 



Mr. Ellis had been spraying a considerable part of the portion of the 

 bog that was under his management, and his experience seemed to show 

 that it is not very difficult to control this insect by thorough spraying 

 with arsenate of lead. 



On July 8 the worms (of many different sizes) were present on the badly 

 infested portions of the bog in great numbers, the vines having been turned 

 brown by their work and when opened appearing literally alive with 

 them. So httle foliage was left on the worst infested portions of the bog 

 that death by starvation for a very large percentage of the worms seemed 

 inevitable. 



This insect was also found to be threatening a bog in Mattapoisett this 

 year. Its scientific name is Epelis truncataria var. faxonii Minot. It 

 has also been found feeding on the bearberry {Ardostaphylos uva-ursi L.). 



A considerable number of parasites have been reared from the various 

 cranberry pests, the names of which have not yet been determined. Some 

 of these forms appear to represent species new to science. The species 

 which have been named are fisted in the following table : — 



