Ischyja is a genus of moths of the family Noctuidae erected by Jacob Hübner in 1823.
Description Palpi with second joint broad and rectangularly scaled, reaching vertex of head. Third joint long, naked and oblique. Antennae thickened and fasciculate in male. Thorax and abdomen smoothly scaled. Tibia spineless. Fore tibia with a triangular tuft of hair. Mid-tibia slightly fringed. Hind tibia clothed with long hair. Forewings with highly arched costa towards the apex, which is produced and acute. Outer margin obliquely curved. Hindwings with very short cell. Male with veins 2 to 4 running close together to near outer margin. Larva with four pairs of abdominal prolegs.
Species Ischyja albata Felder & Rogenhofer, 1874 Ischyja anna Swinhoe, 1902 Ischyja ebusa Swinhoe, 1902 Ischyja ferrifracta Snellen, 1863 Ischyja gynnis Prout, 1928 Ischyja hagenii Snellen, 1885 Ischyja hemiphaea Hampson, 1926 Ischyja inferna Swinhoe, 1902 Ischyja manlia Cramer, 1776 Ischyja manlioides Prout, 1928 Ischyja marapok Ischyja neocherina Butler, 1877 Ischyja paraplesius Rothschild, 1920 Ischyja subreducta
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