90 LIST OF DIPTERA. 



Sargus decorus, Say, Long's Exped. Append. 376, 1. Wied. Auss> 



Zweifl. ii. 38, 19. 

 Pennsylvania. East Florida. 



a—c. Trenton Falls, New York. Presented by E. Doubleday, 

 Esq. 



11. Sakgus pallipes. 



Fusco-niger ; antennae, abdominis discus pedesque flava ; tibice 

 anticae medio tarsique antici fusca ; alee sabcinereae, ad cos- 

 tamfuscce. 



Sargus pallipes, Say ; Wied. Auss. Zweifl. ii. 41 , 27. 



Pennsylvania. 



Mexico. 



12. Sakgus nigrifemoratus. 



Mas. Violaceo-viridis ; antennae basi fulvce ; pedes flavi, femo- 

 ribus posticis nigris basi flavidis, femoribus intermediis tibiis- 

 que posticis apice nigris ; ala subfuscescentes. 



Sargus nigrifemoratus, Macq. Dipt. Exot. Suppl. ii. 31, 10. 



13. Sargus? trivittatus. 



Viridis, non metallicus ; antennae apice flavae ; thorax vittis tri- 

 bus latissimis rufo-fuscis ; abdominis segmenta f us co-fasciata. 



Sargus trivittatus, Say t Journ. Acad. Nat. Sci. Philad. vi. 159. 



West Indies. 



14. Sargus Alchidas. 

 Sargus Alchidas, Cat. of Diptera, Pt. 3, 517. 



15. Sargus Bagosas. 

 Sargus Bagosas, Cat. of Diptera, Pt. 3, 518. 



16. Sargus lateralis. 



Mas. Cyaneo-viridis ; caput, antennae, thoracis latera et pedes 

 fulva ; vertex cyaneo-viridis ; ocelli vertice inserti, approxi- 

 mati ; pectus aureo-viride ; abdomen aureo-cupreum, viridi- 

 micans ; alee fuscescentes. 



