Public domain illustration showing characters of genera
Suillia (8a, 8b, 8c) and
Heleomyza (9, 9a, 9b) in the Heleomyzidae. Downloaded from
this source (Watson, L., and Dallwitz, M.J. 2003 onwards. British insects: the families of Diptera. Version: 18th September 2008--
conditions of use) and cleaned up. Original illustration from Walker, F. 1851-1856.
Insecta Britannica: Diptera, Vols. 1–3. Lovell Reeve, London.