Charaxes solon

Species of butterfly
another butterfly with this common name

Speciesbox
| name = Black rajah
| image = Black Rajah Charaxes solon (3836614208). jpg
| image caption = Upper side
| image2 = Close wing position of Charaxes solon, Fabricius, 1793 – Black Rajah WLB. jpg
| image2 caption = Underside
| taxon = Charaxes solon
| authority = (Fabricius) 1793
| synonyms =
Papilio fabius Fabricius, 1781 (preocc.)

The upper side is blackish olive brown, palest basally. Forewing with a transverse discal recurved series of eight yellow spots increasing in size from near the costa, the upper spots mostly rounded, the lower spots being broad and irregularly quadrate with uneven exterior; also a yellow subcostal spot between the lower subcostal veinlets and upper radial, and a smaller spot outside end of the cell above the upper median veinlet; a marginal lower row of minute yellow spots which are more or less obsolescent anteriorly. Hindwing with a transverse discal yellow irregular band, decreasing posteriorly; a submarginal row of small, yellow lunules, and a marginal row of small geminate spots, those at the anal angle being greenish grey. The underside is lilac grey, of a more or less pale or darker tint, but dullest at the base, and purplish tinted externally. Both wings with white transverse discal markings as on upperside, but each inwardly edged by a black line; the basal area crossed by irregular black slender lines. Forewing also with three basal black spots in the cell, a submarginal row of ochreous yellow spots with posteriorly increasing black borders, and a marginal lower row of indistinct purplish white lunules. Hindwing also with a discal more or less defined irregular row of black edged purplish white lunules, and a submarginal row of ochreous yellow spots with blackish outer borders, followed by a marginal row of small, more or less ochreous yellow or greenish ochreous lunules surmounted by an indented black line and white speckles above, and broken lunate white spots below; the extreme margin and tails being blackish edged."

The butterfly is found in South and Southeast Asia. It occurs in Sri Lanka, India, Myanmar, Indochina, Cambodia, Peninsular Malaysia, Singapore, Sumatra, Sulawesi, and the Philippines (Palawan, Sulu Archipelago). In India, the butterfly occurs in South India, and the Himalayas from Kumaon, Sikkim, into Bhutan, through Assam, and onto Myanmar. At least in South Asia, it is not rare.

The black rajah is generally a low elevation butterfly and can be found at altitudes up to 1950 m (6500 feet) ASL. The caterpillars generally feed on Fabaceae, such as tamarind Tamarindus indica.