16 MOTHS AND BUTTERFLIES. 
ends across at right angles to each other: after which fold one of 
the ends over again, put the insect in head downward, being care- 
The Folding of Collecting Papers. 
ful that its wings be flat; fold the other end over, and the envelope 1s 
finished. Some collectors fasten one end of the paper down with a 
little gum or paste; but the dried insect 1s not so easily taken out of 
such a paper. One collector whom I know uses coupon envelopes 
for his butterflies. They are very cheap and convenient to handle, 
being all one size. 
Insects in their papers should be left exposed to the air for a 
couple of days to partly dry; then they may be tied up in bundles, 
3undle of Insects in their Envelopes, 
and are ready to store away in boxes or to be sent by mail or express 
to their destination. 
