SYSTEMATIC ARRANGEMENT. 57 



where that can be done, by borrowing one out of a 

 friend's cabinet, or by making therefrom a good work- 

 ing drawing (in section. &c.). 



The glasses which cover in the drawers should always 

 have separate frames for the more perfect exclusion of 

 dust and mites. 



Well seasoned mahogany or deal may be the material 

 for the drawers, but on no account let them be of cedar, 

 a material often used by ignorant or unprincipled makers, 

 to the great detriment of the collection, and mortifica- 

 tion of the collector, as resinous matter after a short 

 time exudes from the pores of this wood, dropping 

 down on to the glasses below in a gummy shower, and 

 the effluvium seems to condense upon the contained 

 '"nsects, whose wings are gradually discoloured and dis- 

 figured by greasy looking blotches. The drawers are 

 lined at bottom with cork, covered with pure white 

 paper, which should be attached with thin paste. 



The butterflies are then to be arranged in the drawers 

 in perpendicular columns, and in accordance with some 

 system of classification. If there be room it is well to 

 have a considerable numbejr of specimens of each species, 

 especially when it is one liable to much variation. At 

 east one of each sex should always be given, and also 

 une of each sex showing the under surface. When the 

 chrysalis can be procured, that also should be pinned 

 down with its fellow-butterfly, and a good coloured 

 drawing of each caterpillar would be a valuable addition 

 ' the series. Between the columns, lines should bt 



