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.