6. (Zoöl.) Any one of numerous species of large and handsome
butterflies, belonging to Papilio and allied genera, in which the
posterior border of each hind wing is prolongated in the form of a long
lobe.
The black swallowtail, or asterias (see Papilio), the blue swallowtail,
or philenor, the tiger swallowtail, or turnus (see Turnus), and the
zebra swallowtail, or ajax (see under Zebra) are common American
species. See also Troilus.
Swal"low-tailed` (?), a. 1. Having a tail like that of a swallow;
hence, like a swallow's tail in form; having narrow and tapering or
pointed skirts; as, a swallow-tailed coat.