26 



THE BOOK OF BRITISH BUTTERFLIES. 



should be placed in the cells of the drawers of the 

 cabinet, and wrapped in paper and pinned in one corner 

 of the store-cases. An already affected specimen, generally 

 discovered by the small heap of dust beneath it, had 

 better be dipped in benzine, and then blown upon till 

 the benzine has evaporated. The mites will be killed, 

 the colours of the butterfly will not be affected, and 

 through the draught caused by blowing the hairs will 



Dorsal View. 



Ventral View. 



FIG. 8. THE MITE OF THE INSECT CABINET FROM LIFE 

 (magnified 375 diameters). 



not be much the worse. Attention may here be directed 

 to an improved form of store-case recently brought out, 

 in which an invisible naphthalene cell in ingeniously 

 provided. 



As regards mould, its spores are quite invisible, and 

 are almost always present in the air, waiting for a suit- 

 able medium whereon to germinate. Since it is next to 

 impossible to get a case intended to be opened that is 



