Nacaduba angusta

White Lineblue
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Lepidoptera
Family:	Lycaenidae
Tribe:	Polyommatini
Genus:	Nacaduba
Species:	N. angusta
Binomial name
Nacaduba angusta (Druce, 1873)

The White Lineblue Nacaduba angusta^[1][2] is a species of lycaenid butterfly found in South Asia.

Description

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 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 strigae lining the inner side of the discocellulars immaculate, as in N. macrophthalma and N. kerriana.

Distribution

Sikhim ; Bhutan; Assam; Cachar; Burma; Tenasserim; the Andamans. Described originally from Java.^[3]

Presently the butterfly is thought to range in South Asia from Karens to South Myanmar.^[4]

As per Savela, the butterfly ranges, in addition, from northern Thailand, Laos, Vietnam, Singapore, Peninsular Malaysia, Borneo, Sumatra, Java, Nias, Bonggaw, Sulawesi, the southern Philippines, Sanghie, and, possibly Sulu Islands.^[1]

Status

Rare in Myanmar.^[4]

Cited references

1. ^ ^{a b} Marrku Savela's Website on Lepidoptera Page on Nacaduba genus.
2. ^ Card for angusta in LepIndex. Accessed 05 Jul 2007.
3. ^ Bingham, C. T. 1907. Fauna of British India. Butterflies. Volume 2
4. ^ ^{a b} Evans,W.H.(1932) The Identification of Indian Butterflies, ser no H32.1, pp 240

See also

• Lycaenidae
• List of butterflies of India (Lycaenidae)

References

• 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 [1].
• Wynter-Blyth, M.A. (1957) Butterflies of the Indian Region, Bombay Natural History Society, Mumbai, India.

External links

• Asahi Correctly determined photos of N. angusta from the Philippines