84 
ON KILLING AND 
pierced through with a pin, or gummed on a 
piece of card when the insects have left them : 
or, if it be wished to kill a chry salts ^ it may be 
done in a moment by dropping it into scalding 
water. Mr. Donovan says, that “ if the chry- 
salides which have the appearance of gold, are 
put into spirits of wine, they will always retain 
that colour, but, if the insect within is killed 
first, or, if the fly has quitted it, such appear- 
ance is entirely lost.” 
To Preserve Spiders. {Aranea, Lin.) 
This tribe of animals, which are exceedingly 
numerous, and present an infinite variety of 
form and beauty of marking, are generally 
neglected by the collector from the difficulty 
of preserving them. The following method is 
recommended by Mr. Donovan : After the 
spider is killed by means of hot water, the 
entrails should be immediately extracted, then 
inflate them by means of a blow pipe, and 
cleanse the inside no more than is sufficient to 
prevent mouldiness, for fear of injuring the 
colours ; the abdomen may then be filled with 
sand.” This will, in general, answer the pur- 
pose. Mr. Griesbach’s plan is to pierce the 
spider through the thorax with a pin, stick it 
in a deal box, and hold it near the fire for a 
few minutes, when the insect will be found 
