29 



L. The Potato Beetle. 



1. How does the insect pass the winter? When did you first see 

 the adult? 



2. Determine the date of the first appearance of egg-s. How many 

 in a cluster? How long to lay the eggs? How long in the egg state 

 before hatching? Color? Collect. Where are the eggs laid? 



3. Observe the larva in its different moults, and the duration of 

 each moult. Collect the pupae. , 



4. Describe the full life-history. 



LI. Lady=Bird Beetles. 



1. Collect as many kinds of Lady-Birds as you can, taking notes 

 of what they were doing when you collected them. 



2. What other insects did you find on the same plant? 



3. Collect as many Lady-Bird larvae'as you can, and preserve them 

 in vials for reference and study. 



4. Identify the Lady-Birds collected by means of Comstock's Manual 

 and other reference works. 



5. How are Lady-Birds distinguished from leaf-eaters (Chrysome- 

 lids}? 



6. Determine where the pupa is formed and how. 



7. Of what advantage to the Lady-Birds are their bright colors? 



8. Make drawings of the most commonly occurring lady-beetles, 

 showing the variations and marking. 



9. What Lady-Birds do you find in the greenhouse in scale-infested 

 plants, or on apple trees infested with Oyster-Shell Bark Lice? 



10. What Lady-Birds do you find on trees infested with aphis ? 



LII. Some Common Autumn Insects. 



Make a collection of as many members of Orthoptera as possible ; 

 classify, and name them. 



2. Observe the habits of cockroaches, long-horned grasshoppers, 

 short-horned grasshoppers, and crickets. 



3. Determine where they spend the winter. 



4. Describe how the grasshoppers and crickets deposit their eggs. 

 •3. Collect "woolly bears," milkweed caterpillars, dagger Cftterpil- 



lars, tiger caterpillars, fall y--eb-worms, and cabbage worms. Place them 

 in separate boxes and feed them their appropriate leaf-food. Watch 

 carefully from day to day for developments. 



