214 INSTRUMENTS USED IN COLLECTING, &c. 
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,” described at page 156, 
volume first of this work.* 
MACLEAN’S ELASTIC NET. 
This net is constructed of two stout pieces of 
cane, split and connected by a joint at each end, 
also by a rod which lies between them, “in 
which a pully is fixed ; through this a cord fast- 
ened to the canes passes ; a long cane with a fer- 
rule receives the lower end of the rod, and forms a 
handle ; and to the canes is fastened a net of green 
gauze.” The handle is taken in the right hand, 
and the string in the left ; when the latter is pulled, 
the canes bend till they form a hoop, and the net 
appended to them is open ; when insects are within 
it the cord is relaxed, and the canes'become straight. 
Close the mouth of the net, and secure the insects. 
These are kept close by the left hand, and the prey 
is disabled with the right. 
* Page 152, vol. i., First Edition, 
