344 ZOOLOGY 



1. How is locomotion effected? Illustrate by diagrams. 



2. How does the larva feed? Observe and record the movements 

 of the month-parts and of the head during feeding. Draw the outline 

 of a partly eaten leaf. 



3. (This obsercafion must extend through several days.} Make and 

 record observations upon the act of pupation. 



TOPICS FOR FURTHER STUDY 



1. The habits and food of butterflies. 2. The number of broods of 

 butterflies during a single season and seasonal dimorphism. 3. Pro- 

 tective resemblance and mimicry. 4. The larger divisions and com- 

 moner native forms of Lepidoptera. (Examples of Lepidoptera 

 illustrating the commoner native types should be shown and students 

 encouraged to collect and classify them.) 5. The Hymenoptera : 

 their structure, classification, and habits. 



III. BEETLE 



The May-beetle and the potato-beetle are recommended for studies 

 from alcoholic specimens. If these are not available for the " Obser- 

 vations on the Living Animal," any other slow-creeping species 

 may be employed. 



DRAWINGS 



(From alcoholic specimens} 



1. Dorsal view, naming parts, x 8. 



2. Remove the antenna, mandible, maxillae, and legs of right side. 

 Draw posterior view of each part. Use lens, x 15. 



3. Remove the wing case and membranous wing from left side. 

 Draw wing (a) folded, (/;) unfolded, indicating position of creases. 

 Draw imaginary cross-section of the folded wing. 



4. Draw beetle from left side, indicating position of removed 

 wings, x 8. 



5. (Optional.} Draw larva from left side, x 8. 



QUESTIONS ON EXTERNAL ANATOMY 



1. How many segments has the beetle behind the head? 



2. (Optional.} How many segments has the larva? 



