[1] It is a Palearctic species with a limited distribution in Europe (Ireland, Great Britain, the Netherlands, Germany, France, Norway, Poland and European Russia (Karelia).

Microdon myrmicae lives sympatrically with other myrmecophiles including Phengaris alcon, P. nausithous and P. teleius (in one location all four species cooccur).

[3] External images For terms see Morphology of Diptera Wing length 6·75-8·25 mm.

Two color morphs of the species are known: individuals of either sex can be predominantly gold-haired or silver-haired.

However, more males appear to be silver than gold, and the reverse is true for females, suggesting a complex genetic mechanism.