| Common Beak | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Lepidoptera |
| Family: | Nymphalidae |
| Genus: | Libythea |
| Species: | L. lepita |
| Binomial name | |
| Libythea lepita Moore, 1857 |
|
The Common Beak (Libythea lepita) is a butterfly found in India that belongs to the Libytheinae group of the Brush-footed butterflies family.
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The species was earlier considered a race of Libythea celtis (European Beak).[1] The following description is based on the older treatment and the race lepita and lepitoides described below refer to this species.[2]
The larval food plants of the species include members of the Cannabaceae particularly in the genus Celtis and Trema.[3]
Differs from the European beak Libythea celtis as follows : Upperside ground-colour a slightly darker brown. Fore wing : orange-yellow streak in cell much narrower for two-thirds of its length from base, then abruptly expanded anteriorly so as to fill the apex of the cell, the inner margin of the apical portion and the anterior margin of the basal portion forming a clearly defined right angle ; lower discal spot absent, upper larger discal spot somewhat diamond-shaped; subcostal spot and preapical spot placed obliquely outwards from it more distinctly double, the lower portion of the subapical spot orange-yellow, the upper portion and the subcostal spot white. Hind wing: the upper postdiscal orange patch narrower, forming a short band which is no1 curved but placed obliquely transverse, reaching from vein 2 to vein 6, sometimes but rarely with a detached orange spot above it in interspace 6. Underside : ground-colour variable, generally vinous-brown, paler along the costal and dorsal margins of the fore wing; sometimes dark brown on the fore wing, dark greyish on the hind wing, with the costal margin broadly of the fore and the whole of the hind wing irrorated with minute dark striae and spots. Orange and white markings on the fore wing as on the up per side, but the preapical double spot entirely white. The hind wing is more variable; in some specimens it is uniform without any markings, in others it is shaded transversely light and dark, and in a few specimens the wing is longitudinally divided by a dark-brown diffuse band from base along the median vein to apex of vein 5. Antennae, head, thorax and abdomen as in L. celtis.
The Himalayas, Simla to Sikkim, Assam, Upper Myanmar extending to China and Japan.
Differs from lepita as follows:
Hind wing: tornus narrowly produced, dentate or even, subcaudate. Upperside: ground-colour darker brown. Fore wing: the orange-yellow streak in cell divided from the spot in the apex of the cell, the large discal spot smaller, the subcostal and subapical spots more distinctly double, the latter pure white. Hind wing: the transverse short band narrower and more horizontal; a diffuse quadrate pale spot in the middle of interspace 7, larger in the female than in the male. Underside fore wing: ground-colour dark brown, the apex, the termen narrowly and slightly, and the dorsal margin somewhat broadly touched with grey, irrorated with minute dark dots and transverse striae; the orange-yellow and white markings as on the upperside, the former broader and fuller, the cellular streak not interrupted. Hind wing pale grey, shaded broadly at base, on the disc and posteriorly, with brown, the pale grey ground-colour prominently replacing the transverse orange streak and pale subcostal spot of the upperside. In some specimens there is a very dark brown shading from base of the wing along the median vein. The entire surface of the wing is irrorated with minute dots and transverse short striae. Antennae, head, thorax and abdomen as in celtis.
Southern India ; Ceylon.