ON COLLECTING, PREPARATION, AND MOUNTING. 385 



from this again transfer them into another glass containing absolute 

 alcohol and a weak colouring of one of Crawshaw's dyes, which 

 are sold in penny packets, and which form a very good medium for 

 staining scale-insects. Then with the aid of a large but weak lens 

 lift them out of the stain, on the tip of a woodcock's feather, and 

 place them on to a prepared cover-glass. Arrange them as carefully 

 as possible, and absorb the moisture with a clean-cut portion of blot- 

 ting-paper. Then the specimens may be allowed to remain under oil 

 of cloves for a short time, which may in turn be replaced by a drop 



%JfiiJ^ 



Fig. 350. — Prohoscis ofhnncy-bee. 

 (From photo by A. Flatters.) 



Fig. 351.—Tonqne ofhoiisc-fi/. 

 (By A. t'latters.) 



of weak xylol and balsam, and this again further replaced with thin 

 balsam and xylol. The latter may be allowed to remain under an 

 inverted glass for a short time, and then finally mounted on to a 

 glass-slip by pressing the cover-glass with the scales into the balsam 

 on the slip. 



This method may be termed mounting the object on the cover- 

 glass, and is certainly, for this class of work, better than mounting 

 on the slip. All workers, more especially beginners, know full well 

 that when an object is mounted on the slip and the cover-glass after- 



9 R 



