56 INSECTS. 



watched. With no more apparatus than this, specimens 

 may be reared from the egg to the adult condition. Since 

 this would require much time, it is better for the student 

 to get developing nymphs in as many sizes as possible, and 

 keep them long enough to see different molts gone through 

 with by different individuals. 



Study the molting process, and by careful observations 

 get at the answers to such questions as the following : 



1. Has the nymph, when first hatched from the egg, 

 any wings? (Use lens in determining.) 



2. Where does the nymph skin split open when molt- 

 ing occurs? 



3. What part of the insect comes out first? 



4. Does the insect have any difficulty in withdrawing 

 any parts of its body from the old skin? 



5. What signs that molting is about to occur are dis- 

 coverable in the appearance or actions of the nymph? 



6 What is the condition of the insect's exterior before 

 molting, and after? 



7. What organs are relatively best developed and what 

 least developed in early stages, and for what organs has 

 the newly hatched nymph most use ? 



Life-History Box. Make a life-history box for the 

 Carolina locust. Get a neatly lined cigar box, and mount l 

 in it a complete series of specimens from egg to adult, 

 inclusive. The specimens should all be mounted on pins 

 stuck in thin sections of cork glued fast to the bottom 

 of the box. The eggs will need to be fastened with 

 mucilage to a bit of paper, through which the pin may 

 be thrust. The very smallest nymphs will need to be 

 mounted in the same way. The larger ones will have the 

 pins stuck vertically through the middle of the thorax. In 

 addition to nymphs of all sizes, exuviae should be mounted 



i See note on mounting insects, in Appendix, p. 283. 



