Cocytius is a genus of hawkmoths (family Sphingidae). The genus was erected by Jacob Hübner in 1819.
Species , the Sphingidae Taxonomic Inventory accepts eight species. The genera Amphonyx, Ancistrognathus, Morcocytius and Pseudococytius are treated as synonyms. Cocytius antaeus (Drury, 1773) Cocytius beelzebuth (Boisduval, ) Cocytius duponchel (Poey, 1832) Cocytius haxairei Cadiou, 2006 Cocytius lucifer (Rothschild & Jordan, 1903) Cocytius mephisto Haxaire & Vaglia, 2002 Cocytius mortuorum Rothschild & Jordan, 1903 Cocytius vitrinus Rothschild & Jordan, 1903
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