HOW TO KNOW THE BUTTERFLIES 



tance apart, so as to leave a groove for the body 

 of the insect, upon which the wings are fastened 

 in position and left until the insect is dry (Fig. 



19). A narrow strip of 

 cork is tacked to the low- 

 er side of the two strips 

 of wood ; this closes the 

 groove below, and serves as 

 a support for the pin upon 

 which the insect is pinned. 

 Another strip of wood is 

 fastened to the lower side 

 of the cleats to which the 

 two strips are nailed. This 

 serves as a bottom, and 

 protects the points of the 

 pins which project through 

 the piece of cork. 



In spreading a specimen 

 a narrow piece of paper is 

 used on each side to hold 

 the wings in place till they 

 are properly arranged (Fig. 

 19, a). The wings are moved into position by 

 slipping them forward or backward under the 

 slips of paper, using for this purpose a fine pin, 

 which is inserted near a strong vein of the wing. 



3 2 



ailllilllillliLUBiiii'i'lU' 

 Fig. 19. — A spreading-board 



