1. Papilio Machaon. Swallow Tail B. = common yellow swallowtail (Papilio machaon)
2. Papilio Podalirius. Scarce Swallow Tail B. = scarce swallowtail (Iphiclides podalirius)

Title: British butterflies
Year: 1855 (1850s)
Authors: James Duncan, 1804-1861; Georges Cuvier, baron, 1769-1832; Sir William Jardine, 1800-1874; Edward Henry Burth, former owner. DSI
Subjects: Abraham Gottlob Werner, 1749-1817; Butterflies
Source: https://commons.wikimedia.org/wiki/File:British_butterflies_(1855)_(20390909186).jpg

The Old World swallowtail (Papilio machaon) is a butterfly of the family Papilionidae. The butterfly is also known as the common yellow swallowtail or simply the swallowtail (a common name applied to all members of the family, but this species is the 'original', first to go by the name). It is the type species of the genus Papilio.

The scarce swallowtail (Iphiclides podalirius) is a butterfly belonging to the family Papilionidae. It is also called the sail swallowtail or pear-tree swallowtail.