144 



Technique. For studying the chitinous parts, 

 e.g., of the proboscis or genitalia : 



1. Boil in ten per cent, potash until sufficiently 

 transparent. If required, bleach the parts by means 

 of chlorine gas (p. 409). 



2. Wash thoroughly, stain, if required, with a 

 saturated solution of (basic) fuchsin. Wash. 



3. Dehydrate, clear and mount in balsam as for 

 sections. 



