Bionomics of Leptochilus regulus (de Saussure, 1855) 1 female arriving with a portion of the building material 2, 3 female arriving with a prey item 4 female inspecting a willow stem while searching a place for a new nest 5 male perching in front of the nest 6 female of Chrysis ragusae De Stefani, 1888 waiting at the nest site.