Cy 
@ 
SYNOPSES AND DESCRIPTIONS: 
anal bifid or entire; 
teeth equal, smooth; a loreal; crown-shields nine; 
scales keeled, sometimes obsoletely, in 19 to 25 series 
ELAPHIs. 
anal bifid ; 
posterior maxillary teeth longer, smooth; loreal rarely absent; 
crown-shields nine Dromicus. 
SALVADORA, 
Baird & Girard, 1853. 
Elongate, slender; head distinct from neck, long, snout produced; tail 
slender, tapering gradually. Eye large, pupil round. Posterior maxillary 
teeth larger, smooth, isolated. Head-shields nine. Rostral prominent, 
bent back on the head, edges more or less free. A loreal. Nasal divided. 
Anteorbitals two to three. Postorbitals two to three. Scales smooth, gen- 
erally in 17 rows. Anal bifid. Subcaudals in two rows. 
Labials forming the lower edge of the orbit; 
with longitudinal bands grahami. 
Orbit separated from the labials by small shields; 
with a dorsal series of blotches decurtata. 
SALVADORA GRAHAMIAE. 
Baird & Girard, 1853, Cat. N. Amer. Serp., 104. 
Slender, fusiform; head moderate, distinct from the neck, with flat crown; 
tail about one fourth of the total, slender. Eye large, pupil round. Snout 
produced, truncate, inclined from a vertical. Rostral prominent, with 
free edges, bent back on the top of the snout. Crown-shields nine. In- 
ternasals broad, separated in front by the rostral. Prefrontals broad. 
Supraciliaries and frontal long. Nasal divided, nostril lateral near the 
margin of the prefrontal. Loreals one to three. Anteorbitals two. Post- 
orbitals three to two. Labials nine, eye over the fifth and sixth, seventh 
largest. Temporals two, followed by irregular shields. Infralabials nine 
to ten, fifth largest. Posterior submentals small. Scales smooth, in 17 
rows, medial narrow, outer broad. Ventrals 175—186, Anal bifid. 
Subcaudals 75 to 106 pairs. 
Top of the head yellowish brown, from this to the end of the tail extends 
a medial band of dull yellowish one to three scales in width. On each 
