About Allotinus unicolor Felder, 1865
Allotinus unicolor, commonly known as the lesser darkie, is a butterfly species belonging to the family Lycaenidae. It was described by Cajetan and Rudolf Felder in 1865, and is found in Asia. This is an insignificant, rare species that has frequently been confused with closely related allied species up to the present. It is smaller in size than Allotinus horsfieldi and Allotinus posidion. It differs from all of its allies by having distinctly roundish forewings, a trait that resembles Allotinus aphocha Kheil. For female individuals, the outer margin of the hindwings is either fully entire, or, unlike in A. aphocha, only marked with minute teeth. The sexual macula located on the upperside of the forewing is smaller than the one seen in A. posidion. The underside of the wings is white, but does not have the pure pale chalk colouration seen in Allotinus paetus Nicev. The basal section and cell of both wings bear thick, small brown dashes. Distal to the cell on both wings, a distinctively prominent series of brown spots crosses the wing, and these spots join to form a loose band. The uncus is shorter and broader, and has a less deep dorsal indentation, compared to the uncus of A. aphocha.
