FLYTRAPS AND THEIR OPERATION
F. C. BISHOPP
Entomologist, Investigations of Insects Affecting the
Health of Animals
FARMERS' BULLETIN 734
UNITED STATES DEPARTMENT OF AGRICULTURE
Contribution from the Bureau of Entomology
L. O. HOWARD, Chief
| Washington, D. C. | Issued June 10, 1916; second revision, March, 1921. |