Hints as to the Order of Work. 57 



4. Manner of eating (how the jaws work). 



5. Manner of motion and locomotion. 



6. Rate of eating, etc. 



7. Changes in action. 



8. Note all changes with dates until death. 

 Example. Asterias butterfly (caterpillar). 

 ist Observation. Describe it with drawing. 

 zd Observation. Acts sluggish. 



$d Observation. No change. 



4/// Observation. Attached hind foot to roof of box. 



5/7* Observation. Spins a collar or loop to fasten his 

 head in. 



6th Observation. Rests head in loop and goes to sleep. 



1th Observation. Begins to change color. 



th Observation. Begins to change form also. 



qth Observation. Assumes a grayish color and a more 

 angular form. 



Observation. No change. 

 Observation. Splits down the back. 



izth Observation. Emerges from shell, a beautiful black 

 butterfly. 



These should be accompanied by dates, and thus the life- 

 history of the creature can be determined. 



Last fall, while we were studying the metamorphosis of a 

 certain caterpillar confined in a cigar-box, a most interest- 

 ing duel was observed between two caterpillars of the same 

 kind. Both were about ready to go into the pupa state. One 

 had gone up to the top of the box, and was just beginning 

 to fasten his hind foot firmly to the ceiling ; the other, not 

 seeing him, also crawled in the same direction. By the 

 time that No. 2 had reached No. i the latter had begun to 

 spin his collar. No. 2 crawled on, and chanced to crawl 

 over No. i. Then a fight began. No. i struck at No. 2 

 with his head, for he was fastened by his feet to the roof. 

 No. 2 returned the thrust, and each ran out a pair of 

 branching yellow horns, with which they fought until No. 2 

 fell to the floor, while No. i, who became dislodged from 



