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''Byblia ilithyia'', the spotted joker or joker, is a species of
The male has the upperwings of a deep rich orange. The forewing has the costa broadly black until nearly the apex. The cell has three narrow short black bands, the inner and outer not reaching the median vein. An irregular black spot from dorsum to vein 4, continues very narrowly along that vein to meet an oblique irregular band from just beyond the middle of the costa. A postdiscal broad transverse black band from dorsum to vein 4, with the portions of the veins beyond it defined in black. The apex of the wing beyond the broad black edging to the costal border has its upper margin and the terminal portions of the veins defined in black; finally a narrow terminal band. The hindwing has an elongate black sub-costal patch near base, continued posteriorly across the cell by an inner and an outer series of small transverse spots; a complete broad black postdiscal band with the portions of the veins beyond it lined with black, and a narrow black terminal band as on the forewing. Cilia of forewings and hindwings white, alternated with brown.
Underside paler duller orange. Forewing: black markings as on the upperside, but the cell and upper discal markings obscurely margined on the inner side by white; an oblique black line from costa to apex of post-discal transverse band, followed by an oblique pre-apical series of diffuse white spots, the terminal black band as on the upperside but traversed by a broken white line. Hindwing: a sub-basal and a discal broad, transverse white band, both bordered inwardly by a series of black spots, and outwardly by a broad black line; a somewhat narrower postdiscal transverse black band traversed by a series of paired white spots, followed by a row of cone-shaped markings of the ground colour, the apices of the cones turned inwards and broadly white; finally, a black terminal band traversed by a series of white lunules. Antennae black; head, thorax and abdomen dark dusky fulvous red; beneath, palpi white, head, thorax and abdomen dark ochraceous, variegated with some black and white lines and spots.
Female similar, with similar markings, but on the upperside the ground colour is paler, the black markings narrower. Forewing: the postdiscal black band nearly complete, interrupted only in interspaces 1 and 4; the terminal black band traversed by a broken white line. Hindwing: no subcostal black patch, instead three series of transverse spots; a postdiscal transverse broad black band bordered inwardly by a series of slender black loops, between these and the postdiscal band a series of spots of the ground colour; the terminal black band traversed as on the forewing by a whitish broken line. Underside similar to that in the male, but the ground colour paler. On the forewing the black markings comparatively narrower, less well-defined; on the hindwing the white on the bands and spots replaced by pale yellow.
The larvae feed on ''
nymphalid
The Nymphalidae are the largest family of butterflies, with more than 6,000 species distributed throughout most of the world. Belonging to the superfamily Papilionoidea, they are usually medium-sized to large butterflies. Most species have a red ...
butterfly found in parts of Africa and Asia.
Description
Wet-season form in Asia
The male has the upperwings of a deep rich orange. The forewing has the costa broadly black until nearly the apex. The cell has three narrow short black bands, the inner and outer not reaching the median vein. An irregular black spot from dorsum to vein 4, continues very narrowly along that vein to meet an oblique irregular band from just beyond the middle of the costa. A postdiscal broad transverse black band from dorsum to vein 4, with the portions of the veins beyond it defined in black. The apex of the wing beyond the broad black edging to the costal border has its upper margin and the terminal portions of the veins defined in black; finally a narrow terminal band. The hindwing has an elongate black sub-costal patch near base, continued posteriorly across the cell by an inner and an outer series of small transverse spots; a complete broad black postdiscal band with the portions of the veins beyond it lined with black, and a narrow black terminal band as on the forewing. Cilia of forewings and hindwings white, alternated with brown.
Underside paler duller orange. Forewing: black markings as on the upperside, but the cell and upper discal markings obscurely margined on the inner side by white; an oblique black line from costa to apex of post-discal transverse band, followed by an oblique pre-apical series of diffuse white spots, the terminal black band as on the upperside but traversed by a broken white line. Hindwing: a sub-basal and a discal broad, transverse white band, both bordered inwardly by a series of black spots, and outwardly by a broad black line; a somewhat narrower postdiscal transverse black band traversed by a series of paired white spots, followed by a row of cone-shaped markings of the ground colour, the apices of the cones turned inwards and broadly white; finally, a black terminal band traversed by a series of white lunules. Antennae black; head, thorax and abdomen dark dusky fulvous red; beneath, palpi white, head, thorax and abdomen dark ochraceous, variegated with some black and white lines and spots.
Female similar, with similar markings, but on the upperside the ground colour is paler, the black markings narrower. Forewing: the postdiscal black band nearly complete, interrupted only in interspaces 1 and 4; the terminal black band traversed by a broken white line. Hindwing: no subcostal black patch, instead three series of transverse spots; a postdiscal transverse broad black band bordered inwardly by a series of slender black loops, between these and the postdiscal band a series of spots of the ground colour; the terminal black band traversed as on the forewing by a whitish broken line. Underside similar to that in the male, but the ground colour paler. On the forewing the black markings comparatively narrower, less well-defined; on the hindwing the white on the bands and spots replaced by pale yellow.
Dry-season form
Males and females are similar to the wet-season form but the black markings are not so sharply defined. Underside: ground colour darker, on the hindwing a dark ochraceous; the transverse subbasal and discal bands in both sexes white. Wingspan: 50–56 mm. The haploid chromosome number is 17.Distribution
Parts of Africa, central and southern India, andSri Lanka
Sri Lanka (, ; si, ශ්රී ලංකා, Śrī Laṅkā, translit-std=ISO (); ta, இலங்கை, Ilaṅkai, translit-std=ISO ()), formerly known as Ceylon and officially the Democratic Socialist Republic of Sri Lanka, is an ...
.
Host plants
The larvae feed on ''Tragia involucrata
''Tragia involucrata'', the Indian stinging nettle, is a species of plant in the family Euphorbiaceae
Euphorbiaceae, the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is als ...
'', ''Tragia plukenetii
''Tragia'' is a genus of flowering plants in the spurge family, Euphorbiaceae. It is widespread across North and South America, Africa, the Arabian Peninsula, the Indian Subcontinent, northern Australia, and to various islands in the Caribbean ...
'', ''Tragia dubanensis
''Tragia'' is a genus of flowering plants in the spurge family, Euphorbiaceae. It is widespread across North and South America, Africa, the Arabian Peninsula, the Indian Subcontinent, northern Australia, and to various islands in the Caribbean ...
'', ''Tragia glabrata
''Tragia durbanensis'', the stinging nettle creeper, is a twining herb in the family Euphorbiaceae,Pooley, E. (1998). ''A Field Guide to Wild Flowers; KwaZulu-Natal and the Eastern Region''. . with a restricted distribution in southern Africa.S ...
'', ''Dalechampia capensis
''Dalechampia capensis'' is a species of shrub. It is known by the common names inzula or wild hop.
It is native to Botswana, South Africa, Mozambique, Eswatini, Tanzania, and Zambia. The species is eaten by larval ''Byblia ilithyia'' and ''Eur ...
'', and ''Tragia cannabina
''Tragia'' is a genus of flowering plants in the spurge family, Euphorbiaceae. It is widespread across North and South America, Africa, the Arabian Peninsula, the Indian Subcontinent, northern Australia, and to various islands in the Caribbean ...
''.
References
{{Taxonbar, from=Q3595409 Butterflies described in 1773 Biblidinae Butterflies of Asia Butterflies of Africa Lepidoptera of Cape Verde Butterflies of Sri Lanka Taxa named by Dru Drury