338 INTRODUCTION TO ZOOLOGY chap, xxu 



4. Look foT llie egg8 of the Oliameleoix-fly on the leaves of water- 

 plants which rise above the level of the water ; keep them care- 

 fully in a similar position in your aquarium, and as soon as they 

 hatch, study the movements of the larvae. Follow the whole life- 

 history, making a series of illustrative sketches. 



