SPREADING BUTTERFLIES. 
25 
the surface of the setting board slightly bevelled towards the 
middle groove, as in this way a drooping appearance of the 
wings is prevented. See fig. 8. 
The pin is passed through the thorax of the insect into the 
BiG. 8. 
cork in the groove and then the body lying in the groove, 
the wings are taken, first on one side and then on the other, 
with a fine pair of forceps (never with the fingers), placed 
