[17] Nature-Study Quarterly, No. 8: Leaflet 21. January, 1901.

[18] Nature-Study Quarterly, No. 4: Leaflet 17. March, 1900.

[19] Nature-Study Quarterly, No. 9: Leaflet 22. May, 1901.

[20] Teachers' Leaflet, No. 9, May, 1897.

[21] It was the desire of the author to tell the story of this leaflet in pictures as well as in words, and he wishes to express his appreciation of the enthusiasm and ability with which the illustrations were executed by Mr. C. W. Furlong.

In this edition are added half-tone reproductions of photographs to bring out more completely the life story.

[22] Nature-Study Quarterly No. 8: Leaflet 21, January, 1901.

[23] Teachers' Leaflet No. 7, June, 1897.

[24] Teachers' Leaflet No. 5, June, 1897.

[25] If a specimen of the moth could be obtained, it would be much more interesting to the children than the picture. The teacher can collect or breed the moths in July to use the next spring to illustrate the lesson.