30 



pair, when at rest, being concealed by the upper pair, 

 which are straw-colored, with two broad scarlet bands 

 across them, and a black spot at the tips. On turning 

 up the leaves of the vine cautiously, the insects will 

 be seen in great numbers with their puncturing 

 tubes thrust into the tender epidermis. When the 

 vine is agitated, the little Tetiigonice leap from it in 

 swarms, but soon alight and recommence their destruc- 

 tive operations. The infested leaves at length become 

 yellow, sickly, and prematurely dry, and give to the 

 plant, at midsummer, the aspect it assumes naturally 

 on the approach of winter. These insects pass through 

 all their metamorphoses upon the plant ; the wingless 

 larvae and pupae are active, have a general resemblance 

 to the perfect insect, and feed together in the same 

 manner beneath the leaves, where also are found ad- 

 hering innumerable empty skins, cast off by them in 

 their progress to maturity. They survive the winter 

 in the perfect state, hybernating beneath sticks, stones, 

 and fallen leaves, and among the roots of grass. The 

 Tettigonia of the vine is more hardy, and more viva- 

 cious than the ^^phis ; hence the applications that have 

 proved destructive to the latter are by no means so 

 efficacious with the former. Fumigations of tobacco, 

 beneath .a movable tent placed over the trellises, an- 

 swer the purpose completely. They require frequent 

 repetition and considerable care to prevent the escape 

 and ensure the destruction of the insects ; circum- 

 stances which render the discovery of some more 

 expeditious method an object of great importance to 

 those whose vineyards are extensive. 



