INSECTS IXJUKIOUS TO THE CKAXBEUKY. 



121 



This year I went over the snme bogs, and found it scarce. 

 It seems to be widely distributed over the Cape, as I have 

 not failed to tind it on every bog I have visited. 



There is a little Chalcis fly that is a parasite upon this 

 insect, and destroys large numbers. It is doing far more 

 than man can to keep this insect under. 



I did not find this maggot numerous anywhere during 

 tlie early part of the summer. On the 23d of this month 

 I went over the bog of^Mr. Nathaniel Hincldey, of M;irs- 

 ton's Mills, and found traces of the insect everywhere ; it 

 was too late to find the insects themselves, but in some 

 places you could scarcely find a shoot but liad been 

 checked by the maggots. 



The efft?ct of the occupation of this maggot of the tip 

 of the shoot can be readily seen. The minute leaves and 

 tender tip are killed, and the growth is stopped. If the 

 shoot is strong, it may put out a shoot at the side, and 

 this may, in turn, be checked. 



I have seen a shoot start the third time, although, most 

 frequently, they do not grow more, but form buds, from 

 which start side shoots next year. 



Mr. Hinckley and myself searched in vain for a side 

 shoot with fruit on it. I have seen them with fruit, but 

 rarely. 



In June, I tried to drown some of these maggots, and 

 as they moved after remaining under water fourteen days, 

 I gave it up. Later in the season, I met with Mr. Calvin 

 Crowell, of West Sandwich, who informed me that he 

 had saved some of his vines by flowing ; that after his 

 bog had been flowed, he noticed that some of the shoots 

 came right up between the leaves that were misshaped, 

 proving that something had removed the insect. The 

 only way that I could account for it was that the water 

 might have washed out the maggots, and, they being 

 without legs, could not get back to the end of the shoot. 

 Since then, I have seen some things that led me to think 

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