INTRODUCTORY STUDIES OF LIVING ANIMALS 13 



under side, the marks of the legs and the feelers, and pos- 

 sibly the wings, all pressed close against the body. Find 

 also the breathing pores along the sides of the abdomen. 



8. Unlikeness between male and female is called 

 "sexual dimorphism." Explain how the tussock moth 

 shows this. For what work does each form seem par- 

 ticularly adapted ? 



9. What methods would you use that the tussock moth 

 might be destroyed or kept out of a community .■' 



Suggested drawings. 



a. A caterpillar, x 2. 



6. A cocoon with its egg mass. 



c. A pupa as seen from the under, side. 



d. An adult moth, either male or female. 



, - , . , THE LIVING BEETLE 



Maienais. 



Living beetles in cages, together with portions of the 

 plant upon which they are found ; or if water beetles are 

 used, they should be kept in aquaria. Individual speci- 

 mens in battery jars or wide- mouth bottles, and preserved 

 beetles in pans or vials for reference. 



Observations. 



1. Upon what plant or in what surroundings is your 

 kind of beetle generally found .-' If you can, give its com- 

 mon name. 



2. What is the length, breadth, and thickness of your 

 beetle .-' Would you describe it as a " small " insect or a 

 " large " one .' 



3. Of what general color is it } Describe any color 

 markings you see. 



4. If any of the legs differ from the others or are of 



