318 Vineyard Culture. 



the summer. The insects are black. Another vine-leaf 

 aphis called Pemphigus viti folia, by Dr. Fitch causes an 

 excrescence to appear on the upper sides of the leaves of some 

 kinds of grape. 



In the same order, we find one of the most numerous and 

 troublesome enemies of the grape-vine. It is that which is 

 commonly but erroneously called the Thrips which belongs 

 to another group. This insect, which is familiar to every 

 vine-dresser, is the Tettigonia (^Erytbroneura} vitis, of Harris, 

 described and exemplified before the Cincinnati Horticultural 

 Society, as such, in 1865, by the appropriate committee, who 

 begged that it should no longer be called " Thrips," nor Thrip. 



The instructive and amusing, as well as learned editor of 

 the Practical Entomologist, has given a thorough exposition of 

 these insects, in the February number of this year (1867), to 

 which the reader is referred. His illustrations are distinct, 

 and enable any one to identify the insect. The editor, Mr. 

 B. D. Walsh, mentions seven distinct species, that feed upon 

 the grape-vine, in North America. 



These creatures are so numerous by September, that when 

 the leaves are disturbed, and they fly and leap out into the 

 air, it seems filled with little specks, for they are quite small. 

 They appear to affect certain varieties of grape more than 

 others. Some of those with thin foliage have their leaves 

 almost entirely destroyed by them, while those with thick, 

 substantial leaves, somewhat pubescent on the underside, will 

 entirely escape their ravages, though growing close beside them 

 in the same vineyard. Concord and Hartford will escape, 

 while the Delaware and Clinton suffer. 



The next order of insects is a very large one, embracing a 

 great many that are destructive to the vine. The single spe- 

 cies mentioned by M. Du Breuil, as the Pyralis, I have not 

 been able to identify, from the limited number of books at my 

 command. It may be introduced into our own country one 



