Proceedings of the American Academy of Arts and Sciences. 



Vol. 57. No. 16.— November, 1922. 



STUDIES ON INSECT SPERMATOGENESIS. 



IV. THE PHENOMENON OF POLYMEGALY IN THE SPERM CELLS 

 OF THE FAJVIILY PENTATOMIDAE. 



By Robert H. Bowen. 



From the Department of Zoology, Columbia. Univ ersity. 



With Two Plates. 



