charles] 



CALENDAR FORMS 



7' 



TREE AND SHRUB CALENDAR 



Other generalizations may be derived from data of seed ma- 

 turity, leaf coloration and leaf fall, but the teacher must observe 

 caution in holding within bounds the tendency to "explain" phe- 

 nomena. 



An insect calendar is more difficult to organize. For certain 

 groups, e. g-, butterflies and moths (Lepidoptera), it may take 

 this form: 



BUTTERFLY CALENDAR 



Some butterflies hibernate in the adult stage, others pass the 

 winter in the egg, others in the larval (caterpillar) stage, while 

 some migrate southward. Insects have been sorely neglected in 

 our nature-study practice, and must some day come into the 

 prominence which their great significance, economic and biolog- 

 ical, warrants. Any method of encouraging insect-study is desir- 

 able, and if nothing further is attempted it will be well worth 

 while to keep the following very simple record : * 



INSECT CALENDAR 



