TRANSACTIONS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



For Promoting Useful Knowledge 



Nezv Series^ Vol. XXI, Part III., ^to., 77 pages, 

 with J plates. Just Published 



Chromosomes in the Spermatogenesis of the Hemiptera 



Heteroptera. 

 By Thos. H, Montgomery, Jr. 



Subscription-— Five Dollars per Volume 



Separate parts are not sold 



Adch-Qyis Thk Librarian of the 



AMERICAN PHILOSOPHICAL SOCIETY 

 No. 104 South Fifth Street 



PHILADELPHIA, U. S. A. 



