Butterflies of the
Family - LYCAENIDAE
Tribe - POLYOMMATINI
Prosotas dubiosa, Chilapata, West Bengal, India
the tribe Polyommatini are characterised by being small in size, and
marked on the underside with a pattern of small spots or striations.
The uppersides of males are in most species covered in metallic blue
scales, while females are predominantly dull earthy brown in
The tribe has
worldwide distribution and contains such familiar species as the Pea
Blue Lampides boeticus, Chalkhill Blue
Polyommatus coridon, African Tiger
Blues Tarucus spp;
and Oriental genera including Castalius,
Nacaduba and Jamides.
The genus Prosotas
contains about 20 species, distributed variously from India to the
Philippines, Malaysia, Indonesia and Australia. On the upperside the
males of all species are deep iridescent purple-blue in colour. The
females of most species are dark brown with a few pale blue scales
at the base of the wings. Most species possess a single short tail
on the hindwing, the exception being dubiosa
which is tailless. The undersides of all species are similar, being
earthy brown with pale-edged maculae.
Prosotas dubiosa is
a common and very widespread species, found in India, Sri Lanka,
Myanmar, China, Thailand, Malaysia, Indonesia, Papua New Guinea and
butterfly occurs in disturbed evergreen and deciduous forest
habitats at altitudes between sea level and about 800m.
caterpillars feed on Archidendron,
Dalbergia ( Fabaceae ),
Acacia ( Mimosaceae ),
and Litchi ( Sapindaceae )
Males are commonly found imbibing
mineralised moisture from damp soil or leaf-litter on the forest
floor. Both sexes are commonly seen flying around flowering bushes in
forest clearings and forest-edge habitats. They often rest on foliage
at a height of about 1m on bushes in dappled sunlight.