i6i 



scales are rubbed off, and that a crookedly 

 ■ mounted specimen is better than a ' rubbed ' one. 



5. Push the pin steadily through the thorax, 

 so that it emerges as near the centre of the dorsum 

 of the thorax as possible. [Practise mounting" by 

 forcing the fine pin through without aid from the 

 other hand.] 



6. Having transfixed the mosquito, force the 

 point of' the pin one millimetre beyond the back, 

 by pressing it against the smooth surface of a cork 

 or tissue paper. The pin should not be pushed 

 througli too far, as it prevents the lens of the 

 microscope being brought near enough for 

 examination. 



Fig. 41. Authors' Method of Preserving Mosquitoes 



7. Placing the disk against a cork, pass 

 carefully through the edge a large entomological 

 pin. This is passed in the reverse direction to 

 the fine pin. Force three-quarters of the length 



M 



