SYRPHICI. 53 



sexmaculatus Pal. St. Domingo, Southern States. Pal. Beauvois. 



Ins. p. 224. Dipt. tab. iii, fig. 8. 



N. B. This species evidently belongs to some other genus. 



sexquadratus Walk. Huds. Bay, Nova Scotia. Walker, List, etc. 



Ill, 586. 



slmulatus Harris. Cat. Ins. Mass. 



stegnus Say. Mexico. Say, J. Acad. Phil. VI, 163, 1. 



strigatus Stfeger. Greenland. Staeger, Greenland's Antliater (Sphae- 



rophoria). 



tarsatus Zett. Greenland. Zetterstedt, insecta lapponica. Stager, 



Greenland's Antliater. 



teretus Harris. Cat. Ins. Mass. 



topiarius Meig. Europe (aut.); Huds. Bay, New York (Walk.); Green- 

 land (Stseger). Meigen, Zetterstedt, etc. Stseger, Greenland's Ant- 

 liater. Walker, List, etc. Ill, 582. 



umbellatarum Fab. Europe (aut.) ; Nova Scotia (Walk.). Fabri- 



cius, Meigen, Zetterstedt, etc. Walker, List, etc. Ill, 587. 



vittatifrons Harris. Cat. Ins. Mass. 



Ocyptamus Serv. 



fuscipennis Macq. Philadelphia. Macq. Hist. Nat. Dipt. I, 554, 2, 



tab. xii, fig. 13. 



Sericomyla Meig. 

 chrysotoxoides Macq. Philadelphia. Macq. Dipt. Exot. II, 2, 19, 1. 



Mem. de Lille, 1841, p. 79, tab. iii, fig. 3, bis. 



filia Walk. Huds. Bay, Nova Scotia. Walker, List, etc. Ill, 596. 



lappona Lin. Europe (aut.); Greenland (Fab.). Linne, etc. 0. Fa- 



bricius, Fauna Groenl. p. 208, 169. 

 limbipermis Macq. Nova Scotia. Macq. Dipt. Exot. 2e Suppl. p. 



58, 2. Mem. de Lille, 1846, p. 74 (" perhaps of S. Chrysotoxoides ?" 



Macquart). 



militaris Walk. Huds. Bay, Nova Scotia. Walker, List, etc. Ill, 595. 



sexfasciata Walk. Huds. Bay. Walker, List, etc. Ill, 596. 



tuberculata Harris. Cat. Ins. Mass. 



Tropidia Meig. 



albistylum Macq. North America. Macq. Dipt. Exot. 2e Suppl. 



p. 60, 1. Mem. de Lille, 1846, p. 76, tab. ii, fig. 10. 



N. B. Macquart also refers to this genus Xylota quadrata Say (vid. 



Xylota~). 



Polydonta Macq. 



bicolor Macq. Nova Scotia. Macq. Dipt. Exot. 4e Suppl. p. 144, 1. 



Mem. de Lille, 1849, p. 448, tab. xiii, fig. 6. 



Merodon Latr. 

 Balanus Walk. New York. Walker, List, etc. Ill, 600. 



