Technical Series No. 20, Part VI. 



U. S. DEPARTMENT OF' AGRICULTURE, 



BTJRE^^TJ OF ENT0M:0L0G-Y. 



L 0. HOWARD, Entomologist and Chief of Bureau. 



TECHNICAL PAPERS ON MISCELLANEOUS 

 FOREST INSECTS. 



VI. CHALCIDIDS INJURIOUS TO 

 FOREST-TREE SEEDS. 



S. A. ROHWER, 



Entomological Assistant. 



Issued Febrvary 10, 1913. 



WASHINGTON: 

 GOVERNMENT PRINTING OmOE. 



1913. 



