:]() nUTTERFLY COLLECTOR'S 



]i()t, tn tlio prcsen-ation of tlie Chrysalidrs duriiip; tlic 

 winter, it will be necessary to keep them in cold and moist 

 places, as ill a cellar or out-honse, or tlie greater part of 

 tliem will be killed ; for dry warmth is a\)t to exhale the 

 nutritive moisture I'rom tlieni, harden the shell and weaken 

 the insects so much, that ut tlie tune when they should 

 appear in their winged state, t!liey have not strength left 

 sufficient to burst open the chrysalis and come forth fr<nn 

 their confinement. The shells of Clirymlides have merely to 

 be 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 chrysalis, it nmy be done in a moment by dro])ping it 

 into scalding water. Mr. Donovan says, that " if the Cliri/- 

 sulii/es, which have the appearance of gold, be jnit into 

 spirits of wine, they will always retain that coloiir; but if 

 the insect within be killed first, or if the fly has ipiitted it, 

 such appcai'ance is entirely lost." 



