PREPARATION, CARE, AND DISPLAY OF INSECTS. 331 



FIG. 98. Setting-Board. 



proper depth, and the depth is 

 regulated of course by the piece 

 at the bottom of the setting- 

 board. The two side- pieces 

 should always be from seven- 

 eighths of an inch to an inch 

 thick. The best material is soft, 

 clean pine, or, better still, the 

 wood of the Kiri-no-Ki (Pauloiv- 

 nia regalis). 



Instead of setting-boards, set- 

 ting - blocks (see Figs. 100 and 

 101), may be advantageously employed in setting smaller speci- 

 mens, especially of the Hesperidse and the Noctuidse, the wings 



of which are refractory, and re- 

 fuse to be treated in the method 

 that has just been described. In- 

 stead of using strips of tracing 

 muslin it is necessary, in the 

 case of setting - blocks, to use 

 threads or cords, which may be 

 adjusted, as is show r n in the fig- 

 ure. Care should, however, be 

 taken not to draw the thread or 

 cord so tightly about the wings of 

 the specimens as to cut into their vestiture and thus leave marks. 

 The insects having been adjusted upon the board, care being 

 taken that the pin is set perpendicularly, the next step is to 



FIG. 99. Setting-Board. (After Riley.) 



FIG. 100. Setting-Block. A, Groove for 

 body of insect ; ]i, nick for holding thread ; 

 C, cork to rcreive point of pin passing 

 through holes in bottom of A. 



FIG. 101. Butterfly Expanded upon Setting- 

 Block. 



