The diagnostic characters in Leucania of the French Antilles are somewhat variable and difficult
to interpretate. The identification key presented here might be used with fresh specimens only.
A correct identification in this genus needs an examination of genitalic structures.
Forewings uniformly beige with a black mark and a black spot at the top of the cell.
Fringes of the hindwings very pale:
Forewings with a dark line starting from the base.
Forewings: the cubital vein does not contrast with the dark line.
Forewings: the white cubital vein contrasts with the dark line.
Wide light triangle at the apex of forewings.
Weak contrast on the cubital vein. Light fringes on hindwings. Wingspan 38-41 mm:
Narrow light triangle at the apex of forewings.
Striking contrast on the cubital vein. Wingspan 32-36 mm:
One or two black dots on the first abdominal segments.
Hindwings: darker border and veins lined with black:
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