The Behavior of the Honey Bee in Pollen Collection

U. S. DEPARTMENT OF AGRICULTURE,
BUREAU OF ENTOMOLOGY—BULLETIN No. 121.
L. O. HOWARD. Entomologist and Chief of Bureau.
THE BEHAVIOR OF THE HONEY BEE IN POLLEN COLLECTING.
D. B. CASTEEL, Ph. D.,
Collaborator and Adjunct Professor of Zoology, University of Texas.
Issued December 31, 1912.
WASHINGTON: GOVERNMENT PRINTING OFFICE. 1912.

BUREAU OF ENTOMOLOGY.