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Family Sarcophagidae - Flesh Flies

Fly - Sarcophaga Fly species medium size fly Sarcophagidae - Sarcophaga - male Sarcophaga sp.? - male - female fly Sarcophagidae? Pennsylvania Fly for ID - NOT
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Oestroidea
Family Sarcophagidae (Flesh Flies)
Explanation of Names
Sarcophagidae Macquart 1834
Numbers
about 400 spp. in 49 genera in our area, ~3,100 spp. in >170 genera worldwide(1)(2)(3)(4)
3 subfamilies(5): Miltogramminae (=Miltogrammatinae), Paramacronychiinae, Sarcophaginae
Identification
Similar to blowflies, but generally blackish with gray thoracic stripes (never metallic); 3 black racing stripes on a gray background
The subfamilies are defined, both anatomically and biologically, in(5)
Pictorial key to some S.American spp. in(6)

Although a few species are distinctive, New World Sarcophagidae should be considered impossible to identify.[comment by John F. Carr]
Range
worldwide and throughout NA(4)(1)
Food
Larvae: many species are necrophagous, but some feed in mammalian tissues or parasitize other arthropods (bees, cicadas, termites, grasshoppers/locusts, millipedes), earthworms, or snails(4). Adults feed on various sugar-containing materials such as nectar, sap, fruit juices and honeydew.
Remarks
comprehensive, up-to-date info is provided in(5)

Despite numerous online claims to the contrary, Sarcophaga carnaria doesn't occur anywhere in the Americas. These records are, in part, influenced by a combination of erroneous common name usage and and an obsolete definition of the species. Instead of a single common species, this representation has since been split into nearly 150 subgenera comprising at least 800 described species. For example, virtually all identifications of that species on iNaturalist fall under this obsolete species definition and are taxonomically equivalent, at best, to the current taxonomic concept of Sarcophagidae.
See Also
a few tachinids have the characteristic sarcophagid thorax stripe pattern:
Works Cited
1.Manual of Nearctic Diptera Volume 2
Varies for each chapter; edited by J.F. McAlpine, B.V. Petersen, G.E. Shewell, H.J. Teskey, J.R. Vockeroth, D.M. Wood. 1987. Research Branch Agriculture Canada.
2.Order Diptera Linnaeus, 1758. In: Zhang Z.-Q. (ed.) Animal biodiversity: An outline of higher-level classification...
Pape T., Blagoderov V., Mostovski M.B. 2011. Zootaxa 3148: 222–229.
3.American Insects: A Handbook of the Insects of America North of Mexico
Ross H. Arnett. 2000. CRC Press.
4.Molecular phylogeny of the Calyptratae (Diptera: Cyclorrhapha)...
S.N. Kutty, T. Pape, B.M. Wiegmann, R. Meier. 2010. Systematic Entomology 35: 614–635.
5.Pape T., Dahlem G., de Mello Patiu C.A., Giroux M. (2012) The world of flesh flies (Diptera: Sarcophagidae)
6.Pictorial identification key for species of Sarcophagidae (Diptera) of potential forensic importance in southern Brazil
Vairo, K.P., C.A. de Mello-Patiu & C.J.B. de Carvalho. 2011. Revista Brasileira de Entomologia 55(3): 333-347.