Allotinus horsfieldi, the common darkie, is a small butterfly found in India[1][2] that belongs to the lycaenids or blues family.

[3] As per Savela the butterfly occurs from Thailand, Langkawi, Malay Peninsula, Tioman, Singapore, Borneo, Sumatra, Bangka, Batu, Celebes and Sundaland.

Both forewings and hindwings with numerous short, slender, transverse strigae and minute dots, brown.

The males are fond of sitting on the tops of leaves not very high off the ground and making short circular flights.

The butterfly has also been recorded by one observer to settle over hosts of greenflies (aphids), tickle them with the proboscis and feed on the exudations.