Key to the Macaronesian species and subspecies of Muscina Robineau-Desvoidy 1 Antenna, palp and legs wholly dark................................................... 1. Muscina levida (Harris) - Basal part of postpedicel and palp orange yellow............................................................ 2 2 Tibiae and distal parts of mid and hind femora yellow................................. 4. Muscina stabulans (Fallén) - Legs wholly dark..................................................................................... 3 3 Calypteres including margins and fringes white. Abdomen densely whitish pruinose with prominent shifting dark reflections...................................................................... 2. Muscina prolapsa prolapsa (Harris) - Calypteres grey with blackish margins and fringes. Abdomen thinly bluish white pruinose with only vague pattern of shifting dark reflections...................................................... 3. Muscina prolapsa fuscisquama ssp. nov.

Published as part of Michelsen, Verner & Pont, Adrian C., 2024, Macaronesian Muscidae (Diptera). V. The genera Phaonia Robineau-Desvoidy and Muscina Robineau-Desvoidy, pp. 581-596 in Zootaxa 5458 (4) on page 594, DOI: 10.11646/zootaxa.5458.4.6, http://zenodo.org/record/11548064