394 



HE PRACTICAL (iAivoi^i^ER. 



[Apr. 



ing about, he can with Uttle difficulty catch and destroy them. 

 Thus for every female destroyed in spring, or early in sum- 

 mer, before they lay their eggs, we destroy many hundred 

 caterpillars. 



The following ingenious method of catching winged insects 

 in gardens, is recommended, in the Gardeners' Magazine, by 

 Mr. John Wilson, of Welbeck Gardens, Notts. Take a com- 

 mon hand-glass, the hexagonal or any other form will do. 

















1 t 



remove in the ape|c the whole or part of three of the panes 

 (o b c), then take a second hand-glass, which must be of 

 the same form as the first, and place it on the roof of the 

 first, so that the sides of the one may coincide with, the sides 

 of the other ; then all the interstices between the bottom of 

 the one and the eaves of the other (at efg) must be stopped 

 with moss, wool, or any suitable substance, 

 which will prevent the entrance or exit of the 

 flies. The bottom hand-glass must rest on 

 three pieces of bricks to form 

 an opening underneath. The 

 appearance of the trap, when 

 completed, is simply that of one hand-glass 

 above another. 



Fragments of waste fruit are laid on the 

 ground, under the bottom hand-glass, to attract 

 the flies, which having once entered, never de- 

 scend again to get out, but rise into the upper glass, and buzz 

 about under its roof, till, fatigued and exhausted, they drop 

 down, and are seen lying dead on the roof of the under glass. 

 One of these traps placed conspicuously on the ground, before 

 a fruit-wall or hot-house, acts a decoy. It is surprising to see 

 the eagerness with w^hich all kinds of insects go to examine it, 

 and seeing various kinds of their fellows within, they enter 

 also, and flying upwards buzz through the open panes (a b c). 



