276 GRAMMAR OF ENTOMOLOGY. 



crushed between stones, or otherwise, and the 

 fragments placed in the corner of a collecting box, 

 the fumes will, in a few minutes, be fatal to any 

 insects placed there : the leaves should be with- 

 drawn and replaced by fresh ones every half hour, 

 if possible, and then insects may be pinned and 

 placed in the box without further care during a 

 whole day. 



886. Diptera and Hymenoptera are generally 

 best carried home alive in pill boxes ; the same 

 also with very minute moths : Coleoptera of almost 

 every kind may be safely immersed in the vial of 

 spirits : Orthoptcra and Hemiptera, if large, may 

 be pinned ; if small, put in pill boxes : dragon-flies 

 require to be pinned. 



887. Diptera and Hymenoptera should, when 

 sufficiently large, be pinned, like the Lepidoptera, 

 through the centre of the mesothorax; Coleoptera, 

 through the right wing case ; Orthoptera, through 

 the prothorax ; and Hemiptera, through the meso- 

 thorax, generally in this class a triangular plate: 

 dragon-flies should be pinned in the centre 

 between the four wings. 



888. All insects taken home alive in pill boxes, 

 may be killed thus : — Open the lids of the boxes 

 a very small way, just so as to admit the passage of 

 air, but not the exit of the insect ; then make a pile 

 of the boxes, thus partially opened, on a piece of soft 

 leather placed on a table; invert a pint basin over the 

 boxes ; bum one or two matches under the basin. 



