FALL AND WINTER ANIMAL STUDY. 



435 



its body, becomes shorter and thicker, casts off its skin, and 

 changes to a chrysalis, the whole process taking about two 

 days. The chrysalis can be found under stones, and at- 

 tached to fences near cabbage patches infested with the 

 worms. Those formed in August or September may de- 

 velop into butterflies in two 

 or three weeks. The but- 

 terflies, rather small, with 

 white or yellowish wings 

 spotted with black, can be 

 seen until November. If 

 several are caught with a 

 net, and confined in a bar- 

 rel with ends knocked out, 

 and upper end covered with 



netting, and the barrel be Fig . 47m Cabbage Butterfly and Caterpillar. 



placed over a cabbage plant, 



the butterflies will probably lay their eggs on the cabbage 

 leaves. The hatching of the caterpillars from the eggs 

 and the whole life-history can be observed. 





POLYPHEMUS OB CECROPIA CATERPILLAR. 



If confined in the fall, these usually begin to spin their 

 cocoon ; and the process, often occupying several days, can 

 be observed by teacher and children. The cocoons can be 

 kept (in a cool place, not in the schoolroom) until the 

 next spring, and the escape of the moth observed. 



THE HAIRY CATERPILLARS. 



The tussock-moth caterpillar, and the woolly bears thrive 

 in confinement. The Isabella does not. All are most apt 

 to form their cocoons in dark places ; hence it is well to 

 place in the cage with them pieces of bark or wood under 



