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Notes on the Indo-Australian genus Ziridava Walker (Lepidoptera: Geometridae: Larentiinae), with description of two new species.

The present review summarizes the current state ofknowledge of the genus Ziridava Walker by presenting images of available genitalia slides of the holotypes and paratypes and identifying research gaps for future studies. Two new species, namely Z. mauriakra sp. nov. from the Philippines and Z. orchidensis sp. nov. from the Lanyu Island (Taiwan), are described and illustrated. They share the characteristics of the genus Ziridava, including the uncus reduced to a short trident, the long, slender valvae with costa distinctly broadened for basal one-fourth, the broad juxta constricted medially and the saccus rather rectangular with rounded corners in males and the square-shaped papillae anales, the ductus seminalis arising from a lateral lobe of corpus bursa, with a signum comprised of scobinate patches on the dorsal and ventral surface of corpus bursa in females.