88 
OX ARRANGING INSECTS. 
and one of each showing the underside. Of 
the moths, only the upper side is exhibited. 
Varieties are preserved as far as possible, as 
they are often of great use in determining 
species. One specimen at least, in its na- 
tural state, when at rest should be placed with 
each species. The generic name is struck by 
a pin at the head of a genus, and the specific 
name immediately after each species. The 
drawers must never be left without camphor. 
