Hypsiglena

Hypsiglena is a genus of small, rear-fanged snakes, commonly referred to as night snakes, in the subfamily Dipsadinae of the family Colubridae. The genus consists of nine species. Three of these species have subspecies, which have been maintained pending further investigation.

==Species and subspecies== The following species and subspecies are recognized as being valid. Hypsiglena affinis Boulenger, 1894 Hypsiglena catalinae W. Tanner, 1966 – Santa Catalina night snake Hypsiglena chlorophaea Cope, 1860 – desert night snake Hypsiglena chlorophaea chlorophaea Cope, 1860 – Sonoran night snake Hypsiglena chlorophaea deserticola W. Tanner, 1966 – Great Basin night snake Hypsiglena chlorophaea loreala W. Tanner, 1944 – Mesa Verde night snake Hypsiglena chlorophaea tiburonensis W. Tanner, 1981 – Tiburón Island night snake Hypsiglena jani (Dugès, 1865) – Chihuahua night snake Hypsiglena jani jani (Dugès, 1865) – San Luis Potosí night snake Hypsiglena jani texana Stejneger, 1893 – Texas night snake Hypsiglena jani dunklei Taylor, 1938 – Tamaulipas night snake Hypsiglena ochrorhynchus Cope, 1860 – spotted night snake Hypsiglena ochrorhynchus baueri Zweifel, 1958 – Cedros Island night snake Hypsiglena ochrorhynchus gularis W. Tanner, 1954 – Isla Partida night snake Hypsiglena ochrorhynchus klauberi W. Tanner, 1944 – San Diego night snake Hypsiglena ochrorhynchus martinensis W. Tanner & Banta 1962 – San Martín Island night snake Hypsiglena ochrorhynchus nuchalata W. Tanner, 1943 – California night snake Hypsiglena ochrorhynchus ochrorhynchus Cope, 1860 – Cape night snake Hypsiglena ochrorhynchus tortugaensis W. Tanner, 1944 – Isla Tortuga night snake Hypsiglena ochrorhynchus venusta Mocquard, 1899 – Central Baja night snake Hypsiglena slevini W. Tanner, 1943 – Baja California night snake Hypsiglena tanzeri Dixon & Lieb, 1972 – Tanzer's night snake Hypsiglena torquata (Günther, 1860) – night snake Hypsiglena unaocularus W. Tanner, 1946 – Islas Revillagigedo night snake