38. HYPSIGLENA—39. NATRIX 783 
from Lone Pine), Santa Clara (Los Gatos), and Contra 
Costa (near Christy) counties. 
The only Nevada record is of a specimen from the 
vicinity of Currant, Nye County. 
In Utah, two specimens have been taken near Fort 
Douglas, Salt Lake County. 
Arizonan records are more numerous, and indicate its 
presence at Camp Grant, Graham County; Nigger Jim Can- 
yon, Huachuca Mountains, Cochise County; Fort Buchanan, 
and Nogales, Santa Cruz County; Fort Whipple, and Pres- 
cott, Yavapai County; Bright Angel Creek, Coconino Coun- 
ty; Phoenix and Cave Creek, Maricopa County; and 
in Pima County near Tucson, Gunsight, and in the foothills 
of the Catalina Mountains 18 miles north of Tucson. 
In Sonora, it has been found at Guaymas. 
Habits—Al|most nothing is known regarding the habits 
of this little snake. It probably is nocturnal and usually is 
found under stones. Grinnell mentions one found in a 
clover patch at about four in the afternoon. 
Genus 39. Natrix 
Natrix LauRENTI, Synopsis Reptilium, 1768, p. 73 (type ou/garis=natrix). 
Tropinotus Kuut, Isis von Oken, 1822, p. 473. 
Tropidonotus Bote, Isis von Oken, 1826, p. 205 (type, matrix). 
Rhabdophis Fivzincer, Syst. Rept., 1843, p. 27 (type, sudminiatus). 
Steirophis FirzincEr, Syst. Rept., 1843, p. 27 (type, chrysargus). 
Hydrophilophis Scumipt, Abh. Naturw. Ver. Hamburg, Vol .II, Pt. 2. 
Nerodia Bairp & Girarp, Cat. N. Amer. Rept., Pt. I, Serpents, 1853, 
p- 38 (type, sipedon). 
Regina Bairp & Grrarp, Cat. N. Amer. Rept., Pt. 1, Serpents, 1853, 
p- 45 (type, /eberis). 
Amphiesma Dumerit & Bipron, Erpét. Génér., Vol. VII, 1854, p. 724 
(type, stolatum). 
Bothrodytes Cope, Proc. Amer. Philos. Soc., Vol. XXIII, 1886, p. 495 
(type, subminiatum). 
