STUDIES OF INSECTS 27 



detect approaching danger? Give evidence to support 

 your answer. 



1 8. What is the position of the hind legs when at rest? 

 What relation has this to safety ? 



Reproduction and Development. 19. Describe the ovi- 

 positors and the probable method of their use. Describe 

 the egg packets of grasshoppers, if discovered. About 

 how many eggs in one ? (They are sometimes seen 

 against the glass sides of the vivaria.) 



20. If you have young grasshoppers of various ages, 

 arrange a set of them in what seems to you to be the order 

 of their development. How do young grasshoppers differ 

 from adults ? What changes take place as they develop ? 

 What kind of metamorphosis is this ? 



Summary of Important Points in the Study of the Grasshopper 



1. How many and what distinct regions of the body 

 are there ? 



2. How many antennae? Compare their length with that 

 of the body. What other sense organs did you discover ? 



3. How many legs? For what specially adapted ? How? 



4. How many wings ? What is their resting position ? 

 How do the fore wings differ from the hind wings ? How 

 do the hind wings fold ? 



5. To what kind of feeding are they adapted, biting or 

 sucking the food ? How many and what sets of mouth 

 parts are there ? 



6. How is air necessary for respiration obtained ? 



7. In what various ways are grasshoppers fitted for life 

 in meadows and weed plots ? 



8. How do they meet winter conditions ? 



9. What kind of metamorphosis has the grasshopper ? 



