INTRODUCTION. XV 



setting the pin so that the pin itself shall keep the wing from 

 moving forward or backward, so regulate the height of the 

 three-cornered papers that the wing may be held at the 

 proper height. A setting board may be made as follows : 

 two boards, sloping toward each other, and half" an inch 

 apart, are fastened to a wide board as a base. The chan- 

 nel, or groove, between them should be half an inch deep, 

 and a strip of cork fastened to the bottom for holding the 

 pins. Pin through the body of the insect, and, the body 

 extending along the groove, let the wings rest on the 

 smooth, upward-sloping sides. Place the wings as desired, 

 lay narrow strips of paper over them and pin the strips 

 down. As the wings extend slightly upward, and dry in 

 this position, they will be less likely, to droop after perma- 

 nent mounting. Draw the wings of butterflies forward, 

 in setting, till the hind margins of the fore wings form a 

 straight line. Let this rule apply to any spread insect. 

 Pin a beetle and a grasshopper side by side to show the 

 difference in the position of the wings, both folded and 

 expanded, and the different manner of folding the wings. 

 The name of the insect, date, and place of capture, should 

 be written on a small slip of paper and kept on the pin 

 below the insect. 



In each box of insects place a piece of camphor to pro- 

 tect from injurious insects. 



BREEDING CAGES. 



Take a starch box or chalk box with a sliding cover; 

 cut off three inches from one end of the cover ; slide this 

 short piece of cover into the farther end ; set the box on 

 this end and put in three inches of soil ; insert a sliding 

 glass cover which projects a little above the top of the 



