316 BULLETIN ol, UNITED STATES NATIONAL MUSEUM. 



PLATE Vn. 



1. COPKSTYLUM MARGINATUM Say. wiiij-: Iff, heart of female; lb, antenna. 



2. Skricomyia chalcopyga Loew, wing: '2a, heart (if male. 



3. Skricomyia militai:i.s Walker, wing; '.ia, hinrt leg of male: :ib, heart of male. 



4. Skricomyia chrysotox<)IDK.s Maecj., antenna of male; 4a, antenna of female. 



5. Arctophila flagrans O. S., wing; i'a, heart of male : 'tb, hind leg of male. 

 G. Tkuchocnkmis Bacuxtius Walk., wing. 



7. Kristaus tenax Linne, wing; 7<i. heart of male; 7b, antenna; 7c, hinrt leg of 



male. 

 0. F.RI.STALIS TRANSVERSUS Wiert.. heart of male. 

 8</. Eristalis vinetorum Wiert., hinrt leg of male. 

 9. Eristalis compactus Walker, heart of female. 

 10. Eristalis iiortorum Fahr , wing. 



