Vol. XXV 
AUGUST 25, 1923 
No. 8 
contents 
hiemalis, a Parasite of the Hessian Fly - 
R. W. LEIBY and C. C. HILL 
(Contribution from Bureau of Entomology) 
Page 
337 
Pathogenicity of Ophiobolus cariceti in Its Relationship to 
Weakened Plants ~ - - - - - 
H. R. ROSEN and J. A. ELLIOTT 
( Contribution from Arkansas Agricultural Experiment Station ) 
351 
The Pharynx and Alimentary Canal of the Hookworm Larva- 
Necator americanus - - - “ ~ - 
N. A. COBB 
(Contribution from Bureau ol Plant Industry) 
359 
PUBLISHED BY AUTHORITY OF TOE SECRETARY OF AGRICULTURE 
WITH THE COOPERATION OF THE ASSOCIATION 
OF LAND-GRANT COLLEGES 
WASHINGTON, D. C. 
GOVERNMENT PRINTING OFFICE 
1923 
