28 THE BOOK OF BRITISH BUTTERFLIES. 



hours this must be brushed off with a camel-hair brush, 

 and the insect may look fairly presentable again. 



Arrangement in the Cabinet or Cases. 



Now to place the butterflies in the store-cases or 

 cabinet. They must of course be arranged so that the 

 pins on which they are set are upright and in parallel 

 lines. If the collection is so complete that the insects 

 are likely to remain permanently where they are placed, 

 each row had better be separated from the next by a line 

 ruled on the paper. The space should be wide enough 

 to contain the largest butterfly that occurs in the column. 

 There must in most instances be at least four specimens 

 of each species, to shew the upper and under surfaces of 

 both male and female ; but in general, room will also 

 have to be found for varieties and aberrations. So that, 

 although there are but about sixty-eight British butterflies, 

 probably a complete collection would contain not less 

 than four or five hundred specimens, even if chrysalides 

 and preserved larvae were not added. 



Next comes the naming : and here let me advise every- 

 one to employ the scientific names as much as possible, 

 since they are easily learned and are understood by en- 

 tomologists throughout the world. In the first drawer or 

 case the first column should start with the family name 

 Papilionida. Under that would come the name of the 

 first genus, Papilio. Next would follow as many specimens 

 of the first -species of that genus as were needed, and 

 under them the specific name, machaon. We should, 

 perhaps, next put in a purchased specimen of P. poda- 

 lirius, placing its specific name, podalirius^ beneath it. 

 Then would follow the name of the second genus, Aporia, 

 followed by specimens of the only species, and then the 

 specific name cratagi^ and so on. 



