58 
INSTRUCTIONS FOR, 
do), fold it as in fig., 1, then double one edge up, and the other 
down as in fig. 2. This makes them much more convenient for 
opening than if both edges are folded the same way. A stock of 
these of different sizes should be prepared ready for use. 
These envelopes may then be packed in tins or strong wooden 
Fig. 1. Fig. 2. 
boxes, with some naphthaline sprinkled among them. If tins are 
used, extra care must be taken that the specimens are not damp 
when the tin is closed. Care must be taken not to crush the 
specimens by putting too many into one box ; on the other hand, 
they must be sufficiently tightly packed to prevent them shifting 
about. 
Neuroptera should if possible be pinned ; but if this is impracticable, 
they may be put into papers in the same way as Lepidoptera ; or 
they may be laid in chip-boxes, and kept from rolling about with 
chips of tissue-paper. 
Orthoptera wanted for study of the structure may be put into 
spirit ; but those intended for the dry collection are almost useless 
if they have been preserved in this manner. They should be dried 
quickly and put into sawdust. Sometimes they travel well in papers 
in the same way as Lepidoptera ; but they must not be pressed. In 
the case of large- bodied species, such as Locusts, in a damp climate, it 
is advisable before doing this to make an incision with a pair of fine 
scissors along the under side of the abdomen, and, after emptying it 
of its contents, fill it with cotton- wool. 
Wasps and other smooth, non-hairy Hymenoptera may be put into 
sawdust. 
