01 November 2014

Life History of the Lemon Emigrant

Life History of the Lemon Emigrant (Catopsilia pomona pomona)


Butterfly Biodata:
Genus: Catopsilia Hübner, 1819
Species: pomona Linnaeus, 1775
Subspecies: pomona Linnaeus, 1775
Wingspan of Adult Butterfly: 50-70mm
Caterpillar Local Host Plants: Senna fistula (Fabaceae, common name: Golden Shower), Senna siamea (Fabaceae, common name: Kassod Tree, Siamese Cassia), Senna alata (Fabaceae, common name: Seven Golden Candlesticks).


A female Lemon Emigrant, -f. pomona.

Two male Lemon Emigrants, -f. alcmeone.

A male Lemon Emigrant, -f. hilaria.

Physical Description of Adult Butterfly:
Lemon Emigrant comes in a number of  forms for both sexes, but generally they are moderately large with wing upperside appearing in either white or yellow and black-bordered on the costa and termen of the forewing. There are two groups of forms; namely the 'crocale' group and the 'pomona' group.

  • The 'crocale' group is characterized by having the upperside of antennae black, and the absence of silvery spots at cell-ends on the underside. The male -f alcmeone is mostly white above but yellow in the basal third of the wings and thinly bordered at the forewing apex. The females could appear in the jugurtha or the crocale form. The -f jugurtha is creamy white above with yellow wing base and black border on the forewing costa and termen of both wings. It has a series of black submarginal markings and a black spot at cell-end on the forewing. The -f crocale has a broad black distal border with a series of whitish spots embedded on both wings.
  • The 'pomona' group is characterized by having the upperside of antennae red and the presence of red-ringed silvery spots at cell-ends on the underside. The male -f hilaria has similar upperside as the male -f alcmeone but with lesser extent of basal yellow area. The females could appear in the pomona, catilla or the nivescens form. The -f pomona has yellow wings with reduced black border and markings while -f nivescens is similar but with whitish wings. The -f catilla has large reddish patches on the underside.

A female Lemon Emigrant, -f. jugurtha.

A female Lemon Emigrant, -f. crocale.

A female Lemon Emigrant, -f. catilla.