(syn. Halcyon Ϯ Blue-breasted Kingfisher H. malimbica dryas) Genus Halcyon Swainson, 1821, kingfisher; Gr. ωπε ōpe aspect, appearance; "We have here then at our first examination a series showing little or no colour change, yet appreciable alteration in size, accompanied by a difference in wing-formula and also in bill and feet proportions. Further, while these have retained the particoloured bill there exists a small species with the bill all red. The large forms deserve recognition subgenerically, so I propose the new subgenus HALCYONOPA and name Halcyon dryas Hartlaub as type. This genus and subgenus are confined to Africa, and these give no clue to the original form and coloration of the group." (Mathews 1918).