PROC. ENT. SOC. WASH., VOL. 23, NO. 2, FEB., 1921 41 



DIPTEROUS PARASITES OF SAWFLIES. 1 



BY CHARLES T. GREENE, Bureau of Entomology. 



There are few published records of the Dipterous parasites 

 of the sawflies. 



In this paper I have endeavored to bring together all the 

 records I could find on this subject and have added some new 

 breeding records which are marked with an asterisk. 



The material was reared by Messrs. S. A. Rohwer and Wm. 

 Middleton at the Eastern Field Station, Forest Insect Investi- 

 gations, Falls Church, Virginia. The number following each 

 species refers to the Hopkins U. S. note system used in the Divis- 

 ion of Forest Insects. The date, as here used, is the rearing 

 date or the date on which the fly emerged from the puparium. 



Tachina rustica Fallen, (of Coquillett.) 

 *Host. Macremphytus variana Nort. 



Collected at Plummer's Island, Maryland, by Win. Middleton. 

 Adult emerged May 26, 1916. 



Hopks. U. S. No. 13635. 



Collected at Cupid's Bower, Maryland, by T. E. Snyder. 

 Adults emerged September 1 to 19, 1916. 



Hopks. U. S. No. 13649 q. 



Tachina mella Walker. 

 *Host. Macremphytus variana Nort. 



Collected at Plummer's Island, Maryland, by Wm. Middleton . 



Adult emerged May 29, 1916. 

 Hopks. U. S. No. 13635. 



Phorocera claripennis Macq. 



Host. Neodiprion lecontei Fitch. 



Collected at Tomahawk Lake, Wisconsin, by S. A. Rohwer. 



Adults emerged October 22 and 23, 1912. 

 Hopks. U. S. No. 10169 and 10170. 

 *Host. Neodiprion sp. 



Collected at Kanawha Station, West Virginia, by Dr. A. D. 



Hopkins. Adults emerged August 23, 1912. 

 Hopks. U. S. No. 10719 b. 



Phorocera sp. 

 *Host. Neodiprion sp. 



Collected at Cardinal, Virginia, by W. P. Smith. Adults 



emerged July 31, 1915. 

 Hopks. U. S. No. 10737 k. 



Phorocera sp. (near macra.) 



Host. Ncodl priori Iccontei Fitch. 



Collected at Washington, District of Columbia, by I.. Forman. 



iSawfly determinations by Mr. S. A. Rohwer, Custodian of' Hyrncnoptcra, 

 U. S. Nat. Mus. 



