Wing of male of Orthonevra pulchella from Vockeroth and Thompson (1981, fig. 53) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Brachyopa notata from Vockeroth and Thompson (1981, fig. 52) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Sphegina keeniana from Vockeroth and Thompson (1981, fig. 51) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Neoascia distincta from Vockeroth and Thompson (1981, fig. 50) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Cynorhinella longinasus from Vockeroth and Thompson (1981, fig. 49) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Eumerus strigatus from Vockeroth and Thompson (1981, fig. 48) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Microdon cothurnatus from Vockeroth and Thompson (1981, fig. 47) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Ceriana abbreviata from Vockeroth and Thompson (1981, fig. 46) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Salpingogaster punctifrons from Vockeroth and Thompson (1981, fig. 45) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].

Wing of male of Eriozona erraticus from Vockeroth and Thompson (1981, fig. 44) Syrphidae,
Manual of Nearctic Diptera
, Ottawa, p.713-743, (1981)
[1].