and Laboratory Methods. 



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two glasses will depend on the size of the insect and the length of the pin. In 

 many cases it would not need to be more than half an inch. 



It is scarcely necessary to say that the insect should be pressed and dried 

 before mounting. The supporting pin is inserted into the insect when it is spread 

 for drying. I find it best to insert it from the ventral side. Great care should 

 be exercised in making the pin stand perpendicular to 

 the body. As I dry the insects with their wings at right 

 angles to the body, a smooth fiat board is all that is neces- 

 sary for a drying board. By means of the supporting 

 pin the insect is fastened to the drying board, with its 

 ventral aspect uppermost. This allows careful arrange- 

 ment of legs, antenna-, and evisceration when necessary. 



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and in no way hinders the proper arrangement of the 

 wings. 



The case may be all completed with the exception of 

 putting in the glass to which the insect is attached. This 

 is done after the insect has been thoroughly dried and 

 carefully attached to the glass by the supporting pin. 



When the insect is completely mounted the only thing 

 which will obstruct the view any whatever will be the bit 

 of cork or the tiat head of the pin, which need not be at 

 most more than a quarter of an inch in diameter. All 

 parts of the insect can be readily 

 examined even with a hand lens, 

 while at the same time it is perma- 

 nently and securely sealed from all 

 insect pests. 



James Rollin Slonaker. 

 Chicago. 



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