{{Automatic taxobox | name = Hypsiglena | image = Hypsiglena torquata jani.jpg | image_caption = Texas night snakeHypsiglena jani texana | taxon = Hypsiglena | authority = Cope, 1860 | synonyms = Leptodeira (part) – Günther, 1860 Pseudodipsas W. Peters, 1860 Comastes Jan, 1863 <ref>Tanner WW (1944). "A Taxonomic Study of the Genus ' 'Hypsiglena ". Great Basin Naturalist 5 (3 & 4): 25-92.</ref> Eridiphas Leviton & W.W. Tanner, 1960 | range_map = Hypsiglena torquata distribution.svg | range_map_caption = }}Hypsiglena is a genus of small, rear-fanged, colubrid snakes commonly referred to as night snakes. The genus consists of nine species, and subspecies have been maintained pending further investigation.Mulcahy DG, Martínez-Gómez JE, Aguirre-León G, Cervantes-Pasqualli JA, Zug GR (2014). "Rediscovery of an endemic vertebrate from the remote Islas Revillagigedo in the eastern Pacific Ocean: The Clarión Nightsnake, with conservation and systematic implications". PLOS ONE 9 (5): e97682. Species and subspecies The following species and subspecies are recognized as being valid.Hypsiglena affinis Boulenger, 1894 - Boulenger's night snakeHypsiglena catalinae W.W. Tanner, 1966 - Santa Catalina night snakeHypsiglena chlorophaea Cope, 1860 - Sonoran night snakeHypsiglena chlorophaea deserticola W.W. Tanner, 1966 - desert night snakeHypsiglena chlorophaea loreala W.W. Tanner, 1944 - Mesa Verde night snakeHypsiglena chlorophaea tiburonensis W.W. Tanner, 1981 - Tiburón Island night snakeHypsiglena jani (Dugès, 1865) - Chihuahua night snakeHypsiglena jani texana Stejneger, 1893 - Texas night snakeHypsiglena jani dunklei Taylor, 1938 - Tamaulipas night snakeHypsiglena ochrorhynchus Cope, 1860 - spotted night snakeHypsiglena ochrorhynchus baueri Zweifel, 1958 - Cedros Island night snakeHypsiglena ochrorhynchus gularis W.W. Tanner, 1954 - Isla Partida night snakeHypsiglena ochrorhynchus klauberi W.W. Tanner, 1944 - San Diego night snakeHypsiglena ochrorhynchus martinensis W.W. Tanner & Banta 1962 - San Martín Island night snakeHypsiglena ochrorhynchus nuchalata W.W. Tanner, 1943 - California night snakeHypsiglena ochrorhynchus tortugaensis W.W. Tanner, 1944 - Isla Tortuga night snakeHypsiglena ochrorhynchus venusta Mocquard, 1899 - Central Baja night snakeHypsiglena slevini W.W.Tanner, 1943 - Baja California night snakeHypsiglena tanzeri Dixon & Lieb, 1972 - Tanzer's night snakeHypsiglena torquata (Günther, 1860) - Sinaloa night snakeHypsiglena unaocularus W.W.Tanner, 1946 - Islas Revillagigedo night snakeNota bene: A binomial authority or trinomial authority in parentheses indicates that the species or subspecies was originally described in a genus other than Hypsiglena. Geographic rangeHypsiglena are found throughout the southwestern and western United States, from Texas and Kansas, west to California, north to Washington, and south into Mexico, as well as on islands off the coasts