THE INSECT COLLECTION 



173 



exactly adapted to the needs of the subject than the ama- 

 teur can be. 



110. Protection from Injury. The collection, after it is 

 completed is subject to the attacks of many pests and 

 may also be injured by dust, mold, rusting of pins and a 

 variety of causes. 



Boxes with tightly fitting lids are the best protection 

 against the insect pests, but even these will not entirely 

 prevent injury, as the insects will steal into the boxes while 



FIG. 124. A Group of Butterflies Arranged in a " Riker Mount " 

 on Cotton for Decorative Purposes. 



they are opened for study. These pests are most abun- 

 dant and destructive in warm weather but work to some 

 extent throughout the year, especially in warm rooms. 



To free the collect 'on from pests requires a consider- 

 able amount of care. If the boxes are not tightly closed, 

 cigar boxes for instance, they may all be placed in a large, 

 paper-lined goods box for which a tight lid has been made, 

 and fumigated. The best substance for this fumigation 

 is carbon bisulphide. This will be still more effective 

 if the boxes are opened slightly before they are placed in 



