Psilonyx is a genus of robber flies (insects in the family Asilidae). There are about 14 described species in Psilonyx.

Species: These 14 species belong to the genus Psilonyx:

• Psilonyx annulatus (Say, 1823) ^{i c g b}
• Psilonyx annuliventris Hsia, 1949 ^{c g}
• Psilonyx arawak Farr, 1963 ^{c g}
• Psilonyx dorsiniger Zhang & Yang, 2009 ^{c g}
• Psilonyx flavican Shi, 1993 ^{c g}
• Psilonyx flavicoxa Zhang & Yang, 2009 ^{c g}
• Psilonyx hsiai Shi, 1993 ^{c g}
• Psilonyx humeralis Hsia, 1949 ^{c g}
• Psilonyx macropygialis (Williston, 1901) ^{c g}
• Psilonyx magnicauda (Curran, 1934) ^{c g}
• Psilonyx migricoxa Hsia, 1949 ^g
• Psilonyx minimensis (Matsumura, 1916) ^{c g}
• Psilonyx nigricoxa Hsia, 1949 ^{c g}
• Psilonyx zephyrus Scarbrough & Page, 2005 ^{c g}

Data sources: i = ITIS, c = Catalogue of Life, g = GBIF, b = Bugguide.net