Broad-bordered Grass Yellow

Eurema brigitta, the small grass yellow or broad-bordered grass yellow, is a small butterfly of the family Pieridae, that is, the yellows and whites. It is found in India, other parts of Asia, Australia and Africa.

 The wingspan is 30–35 mm. Adults are on the wing year-round.

Food plants: The larvae feed on Hypericum aethiopicum and Chamaecrista mimosoides.

Taxonomic revision: In 2022, the species was split through phylogeographic pattern of by comparing Afrotropical, Malagasy and Oriental-Australian populations using the mitochondrial cytochromec oxidase subunit I marker. After the taxonomic revision, Afrotropical and Oriental-Australian populations were separated by the Indian Ocean and dry habitats on the northern coasts. Therefore now the Oriental-Australian populations into a separate species, Eurema drona.

Subspecies: 

• E. b. brigitta – tropical Africa
• E. b. pulchella (Boisduval, 1833) – Madagascar, Mauritius, Comoro Islands, Aldabra Islands
• E. b. drona (Horsfield, [1829]) – Sumatra, Java to Lombok
• E. b. senna (C.&R.Felder, [1865]) – Peninsular Malaya, Singapore, Indochina
• E. b. fruhstorferi (Moore, 1906) – eastern Indo-China
• E. b. ina Eliot, 1956 – southern Sulawesi
• E. b. hainana (Moore, 1878) – Hainan
• E. b. rubella (Wallace, 1867) – Sri Lanka, India, Burma to southern China, Nicobars
• E. b. formosana Matsumura, 1919 – Taiwan
• E. b. yunnana (Mell)
• E. b. australis (Wallace, 1867) – Australia, New Guinea, Papua New Guinea