REPTILES. 
19 
EUTAENIA ORDINOIDES, B. & G. 
Tropidonotus ordinoides , B & G., Pr. A. N. Sc. VI, 1852, 176. 
Eutaenia ordinoides, B. & G , Catal. N. Am. Serp 1853, 33.— Girard, Herp. U. S. Ex. Ex 1858, 153 ; pi. xiv. figs. 1,4. 
Spf.o. Char. —The largest of the genus. Body very stout. First row of dorsal scales largest, but slightly carinated ; second 
much smaller, only slightly larger than the third. Caudal scales strongly carinated. A dorsal and two lateral stripes. Lateral 
stripe on the second and third rows. Two series of black spots on each side, with the interval reddish brown; these, in large 
specimens, are usually confluent, forming two distinct black stripes, separated by a well defined reddish one. First row of 
scales below the lateral stripe, greenish, slightly darker than the abdomen. Abdomen uniform greenish; dorsal rows, 19.—(Kix- 
NICOTT.) 
No. 889. Between Salt Lake and California. Lt. Beckwith. 
EUTAENIA VAGRANS. B. & G. 
Plate XVII. 
Eutaenia vagrans, B. & G. Catal. N. Am. Serp. 1853, 35. 
Girard, Herp. U. S. Ex. Ex. 1858,154; pi. xiv, figs. 5—10. 
Spec. Char. —Head large and high, eight labials above; sixth and seventh very large, higher than wide, the sixth extending 
above the level of the lower edge of the eye; the seventh much larger than the fifth. Light olive brown above, with two series of 
black spots on each side, the upper of which encroaches upon the dorsal stripe, constricting it at regular intervals, while the 
lower encroaches upon the indistinct lateral stripe. Lateral stripe on second and third rows; dorsal rows, 21.— (Kennicott.) 
No. 919. Camp of May 17, 921, 922, 923. Utah. Lt. Beckwith. 
NERODIA ERYTHROGASTER, B. & G. 
Plate XVIII. 
Coluber crythrogaster, Shaw, Gen. Zool. Ill, 1804, 458. 
Tropidonotus erythrogastcr, Holbrook, N. Am. Herp III, 1842, 33 ; pi. viii. 
Nerodia crythrogaster , B & G. Catal. N. Am. Serp. 1853, 41. 
Spec. Char. —Head small, elongated, narrowing forwards; occipital region flattened. Vertical plate pentagonal, very large, 
as are also the occipitals. Three post-orbitals. An elevated loral. Dorsal rows of scales, 23 in number, all very strongly cari¬ 
nated. Uniform dark bluish black above, lighter on the sides; external band of dull blue extending on the abdominal scutellm. 
Body beneath uniform dull coppery yellow, sometimes with the anterior edge of each scutellse bluish. No distinct spots on the 
abdomen as in N. sipedon. Indications of three series of dorsal blotches, as in N. Woodhousii, in young specimens. 
No. 1320. Cedar creek, Arkansas. Lt. Beckwith. 
HETERODON NASICUS, B. & G. 
Heterodon nasicus, B. & G. Stansbury’s Report Salt Lake, 1852, 352.— Ib. Catal. N- Am. Serp. 1853, 61. 
Spec. Char. —Vertical broader than long. Rostral excessively broad and high. Azygos plate surrounded behind and on the 
sides by many small plates (12-15.) A second loral. Labials short and excessively high. Dorsal rows of scales 23, exterior 
alone smooth. A dorsal series of about 50 blotches, with four or five others on each side. Body beneath black. A narrow 
white line across the middle of the superciliaries ; a second behind the rostral. A broad dark patch from the eye to the angle 
of the mouth, crossing_the last two labials. 
No. 1263. Rocky Mountains. Lt. Beckwith. 
PITYOPHIS BELLONA, B. & G. 
Churchillia bellow, B. & G., Stansbury's Report, 1852, 350. 
Pituophis bellona, B. & G., Catal. N. Am. Serp., 1853, 66. 
Pituophis affinis, Hallowell, Pr. A. N. Sc. VI, 1852, 181. 
Spec. Char.— Head broad behind, tapering to the snout. Snout rather pointed but less so than in P. sayi, elevated. Crown 
flattened between the eyes and posteriorly. Vertical plate broad anteriorly, elongated and narrow posteriorly. Auti-orbitals 2, 
