Frank.Vassen: Wollschweber (Anthrax anthrax), Fagne de la Petite Roer, Sourbrodt, Ostbelgien
Frank.Vassen: Anthrax anthrax, Parc de Woluwé, Brussels
Frank.Vassen: Exoprosopa jacchus, Le Collet-de-Dèze, Lozère, France
Frank.Vassen: Hemipenthes velutina, Le Collet-de-Dèze, Lozère, France
Frank.Vassen: Cyllenia rustica (Bombyliidae), Le Collet-de-Dèze, Lozère, France
Frank.Vassen: Cyllenia rustica (Bombyliidae), Le Collet-de-Dèze, Lozère, France
Frank.Vassen: Villa hottentotta, Parc de Woluwe, Bruxelles
Frank.Vassen: Villa hottentotta, Parc de Woluwe, Bruxelles
Frank.Vassen: Hottentot bee fly (Villa hottentotta), Pen-er-Malo, Guidel, Brittany, France
Frank.Vassen: Villa sp. ♂ (ID to be confirmed), Le Collet-de-Dèze, Lozère, France
Frank.Vassen: Unidentified Bee-fly (Bombyliidae), Romania
Frank.Vassen: unidentified Bombyliidae sp., Fort du Loc'h, Guidel, Brittany, France
Frank.Vassen: Large bee-fly (Bombylius major), Parc de Woluwé, Brussels
Frank.Vassen: Dotted Bee-fly (Bombylius discolor), Parc de Woluwé, Brussels
Frank.Vassen: Dotted bee-fly (Bombylius discolor), Parc du Rouge Cloître, Brussels
Frank.Vassen: Dotted Bee-fly (Bombylius discolor), Parc de Woluwe, Brussels
Frank.Vassen: Dotted bee-fly (Bombylius discolor) stretching proboscis, Parc de Woluwé, Brussels
Frank.Vassen: Bombylius discolor, Parc de Woluwé, Bruxelles
Frank.Vassen: Bombylius major, Parc de Woluwe, Bruxelles
Frank.Vassen: Bombylius major, Parc de Woluwe, Bruxelles
Frank.Vassen: Bombylella atra, Serra de Malcata near Penamacor, Portugal