62 STUDIES OP ANIMAL LIFE. 



4. Is the larva more like the earthworm or the cray- 



fish in appearance ? Why ? 



5. How many legs has the larva ? 



6. Are all the legs of the same kind ? 



F. Drawings. 



1. Draw each stage, natural size. 



G. Suggestive Questions. 



1. In what stage does the moth grow the most? 



2. In what stage does it cause the most damage ? 



3. Do butterflies make cocoons ? 



4. Do all insects have a metamorphosis ? 



7. THE METAMORPHOSIS OP THE MOSQUITO. 



A. Eggs. The first stage. 



1. Observe the arrangement of a packet of eggs. 



2. What is the shape of a single egg ? 



3. Can you wet them by putting them under water ? 



4. Can you make out the "trap door," on the under 



side of the egg, through which the young mos- 

 quito hatches into the water ? 



5. Draw. 



B. liarva. The second stage. 

 1. Alive in a jar of water. 



a. Why are they called " wigglers " ? 



b. What position do they take when at rest ? 



c. Must they wiggle to reach the surface of the 



water, or do they rise to the surface like a cork ? 



d. Must they wiggle to reach the bottom, or do 



they sink without exertion like a heavy chip ? 

 Are they lighter or heavier than the water in 

 which they live? 



