62 iNSTRtJCTIONS FOR 



wings folded together over their backs. These envelopes may be 

 made thus : taking an oblong piece of paper (almost any sort will 

 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. 



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. 



07'thoptera 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. 



Sometimes specimens retain their colours and keep in good con- 



