Proceedings of the American Academy of Arts and Sciences. 

 Vol. XLII. No. 5. — June, 1906. 



CONTRIBUTIONS FROM THE ZOOLOGICAL LABORATORY OF THE 

 MUSEUM OF COMPARATIVE ZOOLOGY AT HARVARD COLLEGE. 

 E. L. MARK, DIRECTOR. — No. 179. 



SOME STAGES IN THE SPERMATOGENESIS OF 

 THE HONEY BEE. 



By E. L. Mark and Manton Copeland. 



With a Plate. 



