The Small Four-line Blue Nacaduba pavana
is a species of lycaenid
butterfly found in Southeast Asia
- See glossary for terms used
Male upperside: purple with a frosted silvery-blue sheen very much as in N. macrophthalma
. Fore wing : a slender black anticiliary line. Hind wing: costal and dorsal margins somewhat broadly dull brown, an anticiliary black line as on the fore wing; the subterminal black spots in interspaces 1 and 2 of the underside apparent in most specimens by transparency. Underside: groundcolour and markings similar to those of N. macrophthalma
but far more slender and more neatly defined. Antennae, head, thorax and abdomen as in N. macrophthalma
Female upperside, fore wing: costa broadly, apex and termen still more broadly brown; a narrow edging of pale brown along the dorsal margin ; rest of the wing grey, shot with iridescent blue in certain lights. Hind wing: pale brown, much paler than the brown on the fore wing; base very obscurely shot with iridescent blue ; costal and dorsal margins brownish white; a transverse subterminal series of black spots edged inwardly and outwardly with slender white lines, two minute spots in interspace 1 geminate, that in interspace 2 large, these three crowned inwardly beyond the white edging with an additional dusky spot. Underside: very similar to that of the male, ground-colour paler, transverse white strigae broader. Both male and female have the basal area of the fore wing within the transverse white strigss lining the inner side of the discocellulars immaculate, as in N. macrophthalma and N. kerriana.
Bingham (1907) reports the butterfly from Sikkim; Bhutan; Assam; Cachar; Burma; Tenasserim; the Andamans. Described originally from Java.
As per Savela the butterfly ranges from Tibet, India - Myanmar, Thailand, Malaysia, Singapore, Langkawi, Sumatra, Philippines (Mindanao) and Sulawesi.
The butterfly has five subspecies:
- Nacaduba pavana pavana
- Nacaduba pavana singapura
- Nacaduba pavana vajuva
- Nacaduba pavana georgi
- Nacaduba pavana visuna
The Violet Four-line Blue (Nacaduba pavana vajuva)
The subspecies Nacaduba pavana vajuva
Frühstorfer 1916, which is known as the Violet Four-line Blue, occurs in India, Myanmar and Thailand.
It was earlier considered a separate species.
- Beccaloni, G. W., Scoble, M. J., Robinson, G. S. & Pitkin, B. (Editors). 2003. The Global Lepidoptera Names Index (LepIndex). World Wide Web electronic publication. http://www.nhm.ac.uk/entomology/lepindex.
- Evans, W.H. (1932) The Identification of Indian Butterflies. (2nd Ed), Bombay Natural History Society, Mumbai, India
- Haribal, Meena (1994) Butterflies of Sikkim Himalaya and their Natural History.
- Marrku Savela's Website on Lepidoptera
- Wynter-Blyth, M.A. (1957) Butterflies of the Indian Region, Bombay Natural History Society, Mumbai, India.