ENTOMOLOGICAL INSTRUMENTS, &c. 517 
one end of your stick. When not employed, they double 
the hoop and conceal it under the vest; they fix to it a 
muslin bag of two feet long. This net is made to serve 
various purposes. With it they catch Lepidoptera and 
other flying insects; and an adroit collector by giving it a 
certain twist completely closes the mouth, so as to prevent 
the escape of his captives. Fixed to a very long pole 
(Mr. Haworth says it should be twenty or thirty feet 
long *), it is the best net for the purple emperor butterfly 
(Apatura Iris). It is also used with success to push be- 
fore you through the grass of meadows, woods, &c., and 
thus often displaces numerous insects, which fall into it : 
—every now and then it is examined, and the valuable 
captures secured. ‘The common bag-net will perform 
the same operations, but is not deep enough for flying 
insects. If you lengthen your stick before you screw it 
on, it enables you to brush with it the weeds at the sides 
and bottom of ditches. This employment of brushing 
the grass, &c. may be carried on if you are walking with 
any friend not interested in Entomology, without much 
interruption of conversation. For this last operation— 
sweeping the grass, &c.—if you wish at any time to de- 
vote a morning wholly to it, you will find a net invented 
by Mr. Paul, of Starston in Norfolk, and which he em- 
ploys to clear his turnips of Haltica Nemorum>, a very 
useful implement. The accompanying figure will give 
you a better idea of it than any description®; you may 
make it large or small according to your convenience : 
the wider it is, the greater space it will brush at once. 
* Lepidopt. Britann. 20. > Vox. I. p. 186. 
© Pratt XXIV. Fie. 3. 
