Usia pallescens Becker, 1906 = Usia ignorata Becker, 1906
Usia sicula Egger, 1859 = Usia manca Loew, 1846
Usia anus Becker, 1906 = Usia atrata (Fabricius, 1798)
Usia vicina Macquart, 1841 = Usia aenea Rossi, 1794
Usia striata Baez, 1982 = Parageron striatus (Baez, 1982)
Usia erythraea Greathead, 1967 = Parageron erythraeus (Greathead, 1967)
Usia grata Loew in Rosenhauer, 1856 = Parageron gratus (Loew, 1856)
Usia incisa Wiedemann, 1830 = Parageron incisus (Wiedemann, 1830)
Usia loewi Becker, 1906 = Parageron loewi (Becker, 1906)
Usia lutescens Bezzi, 1925 = Parageron lutescens (Bezzi, 1925)
Usia major Macquart, 1840 = Parageron major (Macquart, 1840)
Usia punctipennis Loew, 1846 = Parageron punctipennis (Loew, 1846)
Usia cuprea Macquart, 1834 = Usia florea Fabricius, 1794
Usia gagathea Bigot, 1892 = Usia florea Fabricius, 1794
Usia taeniolata Costa, 1883 = Usia aurata (Fabricius, 1794)
Usia sedophila Brunetti, 1909 = Apolysis sedophila (Brunetti, 1909)
Usia ornata Engel, 1932 = Apolysis ornata (Engel, 1932)
Usia tomentosa Engel, 1932 = Apolysis ornata (Engel, 1932)
: document utilisé comme source pour la rédaction de cet article.
David K. Yeates et David Greathead, «The evolutionary pattern of host use in the Bombyliidae (Diptera): a diverse family of parasitoid flies», Biological Journal of the Linnean Society, vol.60, no2, , p.149–185 (DOI10.1111/j.1095-8312.1997.tb01490.x)