BY THE SAME AUTHOR 



Elementary Zoology 



Pp. XV + 492, 172 figs., 12mo, 1901, S1.35. 



First Lessons in Zoology 



Pp. X + 363, 257 figs., 12mo, 1903, SI. 12. 



American Insects 



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

 1905 (American Nalwe Series, Croup I), $5.00. 

 Students' edition, $4.00. 



Darwinism To-Day 



Pp. xii + 403, 8vo, 1907, S2.00. 



Insect Stories 



Pp. vi + 298, illustrated, 12mo, 1908 {Ame,rl 

 can Nature Series, Group V), SI. 50. 



Henry Holt and Company 



Publishers New York 



