4 
> . -* - ' ’*' - r * ~ ^ ^ v * v 
yol. XXl , ; ' • JUNE IS, 1921 ' •■' : ■ ''' No, G \ 
« y CONTENTS 
- \ - \ v \ - " •• Page, 
Biology and Economic Importance of Anastatus semifla- 
vidus, a Recently Described Egg Parasite of Hemileuca 
oliviae - - - * - - 373 
D. J. CAFFREY , " \ 
(Contribution from Bureau of Entomology) 
Varietal Susceptibility of Begins to Rust - r - - 385 
. - \ F. D. FROMME and S. A. WINGARD 
(Contribution from Virginia Agricultural Experiment Station) 
Life-History Studies of Three jointworm Parasites - 405 
W. J. PHILLIPS and F. W. POOS 
(Contribution from Bureau of Entomology) 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 
WITH THE COOPERATION OF THE ASSOCIATION OF 
LAND-GRANT COLLEGES 
WASHINGTON, D. C. 
WASHINGTONGOVERNMENTPRINTING OFFICE : I 62 J 
