J. C. H.  de Meijere, ?Aus Nepenthes-Bechern gezuchtete Syrphiden?, Tijdschrift voor Entomologie, vol. 75 (Suppl.), pp. 153-162, 1932.

C. H.  Curran, ?New American Syrphidae (Diptera), with notes?, American Museum Novitates, vol. 519, pp. 1-9, 1932.

J. R.  Malloch, ?Notes on exotic Diptera (2)?, Stylops, vol. 1, pp. 121-126, 1932.