BY THE SAME AUTHOR 



Elementary Zoology 



Pp. xv 4- 492, 172 figs., 12mo, 1901, $1.35. 



First Lessons in Zoology 



Pp. x -1-363, 257 figs., 12mo, 1903, $1.12. 



American Insects 



Pp. vii + 671, 812 figs., 11 colored plates, 8vo, 

 1905 (American Natire Series, Group /), $5.00. 

 Students' edition, $4.00. 



Darwinism To-Day 



Pp. xii + 403, 8vo, 1907, $2.00. 



Insect Stories 



Pp. \i -(- 298, illustrated, 12mo, 1908 (Ameri- 

 can Nature Scries, Group F), $1.50. 



HENRY HOLT AND COMPANY 



PUBLISHERS NEW YO RK 



