Drepanogynis bifasciata, the Sargasso Emerald, is a species of moth of the family Geometridae first described by Hermann Dewitz in 1881. It is found in South Africa, Lesotho, and Zimbabwe.
Description "Forewing 13-16mm. Thorax green, abdomen brown; forewings green, marked with 2 wide, meandering white lines (edged with brown in some specimens) and white ring between, margins with white flashes, sometimes brown between these; hindwings white basally with central brown cell spot, wide light brown margin often chequered brown and white." (Staude et al., 2023, p. 206)
References Dewitz, 1881. Afrikanische Nachtschmetterlinge. Nova acta Leopoldina Bd. 42, no. 2