THE CANADIAN ENTO]\IOLOGISt. 





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side. The eggs are laid near the tips of the growing canes, and the larvse 

 are usually found feeding on the upper surface of the young leaves. When 



full grown, which is generally from the 

 middle to the end of June, the larva 

 leaves the bush and descends to the 

 ground, where it penetrates beneath the 

 surface and constructs a small oval earthy 

 cocoon mixed with silky and glutinous 

 material. The larva remains unchanged 

 within the cocoon for a considerable 

  period, but finally transforms to a chry- 

 salis from which the perfect insect is 

 produced the following season. 



This is a four-winged fly, shown mag- 

 nified in figure 2, which appears from 

 about the tenth of May to the beginning of June, or soon after the young 

 leaves of the raspberry begin to appear. The wings, which are trans- 

 parent with a glossy surface and metallic hue, measure when expanded 

 about half an inch across ; the veins are black and there is a streak of 

 black along the front margin, extending more than half way towards the 

 tip of the wing. The anterior part of the body is black, the abdomen of 

 a dark reddish hue. Early in the morning when the air is cool these 

 flies, when approached, will fall from the bushes to the ground and remain 

 inactive there long enough to admit of 

 many of them being caught and 

 destroyed, but as the heat of the day 

 increases they become much quicker 

 in their movements, and when dis- 

 turbed take wing readily. 



The larvae may be promptly 

 destroyed by syringing the bushes with 

 water in which powdered hellebore has 

 been mixed in the proportion of an ounce of the powder to a pailful of 

 water, or with Paris green and water in the proportion of a teaspoonful of 

 the poison to a pailful of waiter. 



