38. HYPSIGLENA 781 
Hypsiglena ochrorhyncha var. chlorophea Cope, Proc. Acad. Nat. Sci. 
Phila., 1866, p. 304; Cope, Bull. U. S. Nat. Mus., No. 1, 1875, 
p- 38; Cougs, Surv. W. tooth Merid., Vol. V, 1875, p. 622; Yarrow, 
Bull. U.S. Nat. Mus., No. 24, 1883, pp. 15, 97; Garman, Mem. Mus. 
Compr. Zool., Cambr., Vol. VIII, No. 3, 1883, p. 161. 
? Hypsiglena texana STEJNEGER, N. Amer. Fauna, No. 7, 1894, p. 205 
(type locality, between Laredo and Camargo, Tex.); STRECKER, 
Baylor Bulletin, Vol. XVIII, No. 4, 1915, p. 40. 
Hypsiglena venusta Mocquarp, Nouv. Arch. Mus. Hist. Nat., Paris, 
Ser. 4, Vol. I, 1899, p. 327 (type locality, Santa Rosalia and San 
Ignacio, Lower California, Mexico). 
Hypsiglena ochrorhynchus ochrorhynchus StE|NEGER & BarsBour, Check 
List N. Amer. Amph. Rept., 1917, p.93; Van DensurcH & SLevin, 
Proc. Cal. Acad. Sci., Ser. 4, Vol. XI, 1921, pp. 28, 52, 68. 
2? Hypsiglena ochrorhynchus texana STEJNEGER & Barzour, Check List 
N. Amer. Amph. Rept., 1917, p. 93. 
Description.—Head flat-topped or slightly rounded, and 
snout projecting. Temporal regions usually swollen. Rostral 
plate large, prominent, recurved on top of snout, and 
bounded behind by internasal, anterior nasal, and first labial 
plates. Plates on top of head are a pair of internasals, a 
pair of prefrontals, a frontal, supraocular of each side, and 
a pair of rather short, rounded parietals. Anterior and 
posterior nasals usually distinct, but sometimes united above 
nostril. Loreal small, but often elongate. Two (or one or 
three) preoculars, the lower often very small. Two post- 
oculars. Temporals normally one followed by two, rarely 
2+2, or 1+1. Eight (rarely seven or nine) superior and 
ten (or nine) inferior labials, sixth or seventh superior and 
fifth or sixth inferior largest, fourth and fifth or fifth and 
sixth superior reaching eye, first pair of inferior meeting 
on median line. Genials in two pairs, posterior equal to or 
a little larger or smaller than anterior. Scales on body 
smooth, thin, in 21 or rarely 23 rows. Anal plate divided. 
Gastrosteges varying in number from 160 to 191. Urosteges 
in two series of from 38 to 66. 
