Colias nebulosa is much darker than Colias sifanica ; the forewing without middle spot, but with light spot at the distal margin; the hindwing almost uniformly black, with large,conspicuous, light yellow middle spot, and light ray-like spots on the veins.
Colias | Colias sifanica | Colias leechi | Colias erate | Colias caucasica |