I0 2 THE TRIBES ON MY FRONTIER. 



with grooves of different sizes cut in them to receive the 

 bodies, so that the wings may be level with the surface of 

 the cork. Pass a pin gently through the thorax of each 

 specimen, put its body into one of the grooves, press the 

 pin well into the cork, and then spread out the wings, and 

 keep them in their places with narrow strips of card 

 pinned over them. In two or three days the specimen 

 will be ready for the case, and thenceforth it will be con- 

 spired against night and day by various enemies, the 

 worst by far being an atrocious round beetle, whose off- 

 spring is a still more atrocious hairy grub, which will 

 occupy the inside of the butterfly, and eat away its body, 

 until the wings, with nothing left to connect them, fall to 

 the ground, and the bare pin stands, a melancholy monu- 

 ment, to tell where the gorgeous specimen once spread its 

 splendours. This grub seems to fatten on the smell of 

 camphor or turpentine, and the only device of any per- 

 manent avail against it is to dissolve a little corrosive sub- 

 limate in spirits of wine, and with a fine feather anoint the 

 whole body of each butterfly thoroughly. If you make 

 the mixture too strong it will assuredly leave an unsightly 

 white film upon the back of every black specimen, and if 

 you do not make it strong enough it will only act as a 



