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Genus Musca

Fly - Musca autumnalis - male Fly - Musca domestica Musca domestica? - Musca domestica Fly - Musca domestica - female Fly in Yarrow - Musca autumnalis - male muscid - Musca domestica - male 20160828BOk - Musca - female House Fly? Female? - Musca domestica - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon (Calyptratae)
Superfamily Muscoidea
Family Muscidae (House Flies and kin)
Subfamily Muscinae
Tribe Muscini
Genus Musca
Explanation of Names
Musca Linnaeus 1758
From Latin musca 'a fly'(1) (the word is related to English midge --discussion here)
Numbers
2 spp. in our area (both adventive), dozens in the Old World(2)
Size
adult body 5-10 mm, larva 2-12 mm
Identification
Adult:
M. autumnalis: female eyes far apart, separated by black median stripe (with straight sides) that occupies about one-third of distance between eyes; male eyes nearly touch at midline; female thorax grayish, abdomen gray on top with some yellow on sides; male thorax dark blue-gray, abdomen orange with black dorsal stripe
M. domestica: female eyes far apart, separated by ovoid frontal stripe; male eyes close together but separated by narrow frontal stripe
Range
Old World genus (now cosmopolitan), most spp. tropical(2)
Remarks
Due to their habit of feeding on foul substances as well as human food, carrying bacteria from one to the other, several species spread disease
Print References
Sabrosky C.W. (1959) Recognition of species of Musca. Cooperative Economic Insect Report 9: 988. (Full text)
Works Cited
1.Dictionary of Word Roots and Combining Forms
Donald J. Borror. 1960. Mayfield Publishing Company.
2.Manual of Central American Diptera
Brian V. Brown et al. 2009. NRC Research Press.