Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
1. musca, ae, f. [Sanscr. makshikà, a fly; Gr. μυῖα, of which musca, μυἱσκα, may be a dim. form; cf. Germ. Mücke; Engl. midge, musquito], a fly, Varr. R. R. 3, 16: puer, abige muscas, Cic. de Or. 2, 60, 247: muscas fugare, Mart. 3, 82, 12: muscas captare ac stilo praeacuto configere (solebat Domitianus), Suet. Dom. 3.
Transf., of troublesome persons.
So of inquisitive, prying people, Plaut. Merc. 2, 3, 26; of obtrusive, unbidden guests, id. Poen. 3, 3, 76.
muscus, i, m.