F. Van Demeutter, J. Mortelmans, and M. Reemer (2010)
Long gone or long overlooked? Chamaesyrphus lusitanicus, Cheilosia frontalis, Eristalis alpina and Rhingia rostrata (Diptera: Syrphidae) rediscovered in Belgium.
Bulletin de la Société royale belge d'Entomologie, 146(2):95-100.
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