D. W.  Coquillett, ?Synopsis of the dipterous genus Thereva?, Canadian Entomologist, vol. 25, p. 5, 1893.

P. G.  Strobl, ?Beiträge zur Dipterenfauna des österreichischen Littorale?, Wiener entomologische Zeitung, vol. 12, pp. 121-136, 1893.