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Hi Johan,

Have you tried this key? There are both descriptions of T. fuscus and T. antennatus. Hradský, Milan & Bosak, Jaroslav. (2006). Distribution of some species of robberflies (Diptera, asilidae) in the Canary Islands, and description of three new species of genus Tolmerus Loew, 1849.. Čas. Slez. Muz. Opava (A). 55. 135-145.


Best, Jonne