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Euchromia
horsfieldi Moore
Phalanna horsfieldi Moore,
in Horsfield & Moore, 1858-1859: 328.
Euchromia horsfieldi Moore;
Seitz, 1912-1913: 86.
Diagnosis. The abdomen has no red rings but two pale yellow ones with blue ones
between them (two) and distal to them; the basal transparent area of the
hindwing is partly white. There is a single, elongate yellow patch in the most
posterior space of the forewing, indented posteriorly where that of the previous
species is divided by a black band.
Geographical range. Java, Sumatra, Borneo, Lesser Sundas, Christmas I.
Habitat preference. The species flies in the lowlands, often in open
habitats.
Biology. Horsfield & Moore (1858-1859) illustrated the larva and cocoon. The
former is dull reddish with a black head, dorsal pairs of long hair tufts from
T2 and T3, smaller, similar tufts from A9 posteriorly, and the intervening
abdominal segments each invested with narrow but extensive transverse saddles of
short, dense black setae are embedded in the large silken cocoon. The host-plant
recorded was Dioscorea (Dioscoreaceae).
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