﻿OP THE STATE ENTOilOLOGIST. 25- 



beginning of July, and the second brood from the middle of August 

 to the forepart of September. But instead of the larva3 of the second 

 brood lying underground in their cocoons all winter, they burst forth 

 in the fly state from the beginning to the middle of September. 

 Hence the female fly is compelled to lay her eggs upon the twigs 

 instead of on the leaves; for if she laid them upon the leaves, as is the 

 habit of the Imported species, the second laying of eggs, which has 

 to pass the winter in that state, would fall to the ground along with 

 the leaves in the autumn, and the young larvae would starve when they 

 hatched out next spring before they could find their appropriate food. 

 Consequently, in the case of this species, we cannot apply the 

 method of counterworking the other species which has been already 

 referred to. For we have particularly remarked that the very young 

 larvae were not gathered in great numbers upon one particular leaf — 

 as with the Imported species — but were distributed pretty evenly over 

 the whole bush. Neither did they bore the singular holes through the 

 leaf (Fig. 4), which render the other species so easy of detection when 

 young. 



"As will have been observed from the figures given above, the 

 Native species, besides the diff"erences already noticed, is only about 

 two-thirds the size of the other in all its states. Like the other, it 

 infests both currant and gooseberry bushes, but appears rather to 

 prefer the Gooseberry. Indeed there can be little doubt that our 

 native Gooseberri'^s formed its original food- plant ; for many years ago 

 we captured a single specimen in the nighborhood of Rock Island, 

 Illinois, in woods remote from houses, where the wild gooseberry was 

 pretty abundant, and there was no wild red currant." The species 

 was described in 186G by Mr. Walsh, "from numerous specimens 

 found stripping the gooseberry and currant bushes in Davenport, 

 Iowa; audit has since been reported to us by Miss Marion Hobart, of 

 Port Byron, N. Illinois, as so abundant in her neighborhood in 1868 on 

 the gooseberries as to completely defoliate them three times over, so 

 that she inferred — but we think erroneously — that there were three 

 distinct broods of them, one generated by another. Mr. Jas. H. Par- 

 sons, of Franklin, N. Y., has in a letter to us expressed the same opin- 

 ion with regard to the Imported species. Probably both parties have 

 been deceived by what is a very common occurrence with many leaf- 

 feeding larvas. There is often a warm spell early in the year which 

 causes a moiety of the eggs of a particular brood to hatch out. This 

 is taken for the first brood. Then follows a long spell of cold 

 weather, which prevents the other moiety of the same batch of eggs 

 from hatching out till perhaps a month or six weeks afterwards. 



