REPTILES. 41 



EUTAENIA VAGRANS, B. & G. 



Eutainia vagrant, B. &G. Catal N. Am. Serp. 1853, 35. GIRARD, Herp U. S Ex. Ex. 18o8, 154; pi. xiv, figs. 510. 



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. 926. Near the Gold mountains. Mollhausen. 



EUTAENIA MARCIANA, B. & G. 



Eidainia marciana, B. & G. Catal. N. Am. Serp. 1853, 37. 



SPEC. CHAR. Head triangular, short, very broad posteriorly; nose pointed. Upper labials eight, sixth largest, seventh nearly 

 as large. Body rather stout, sub-cylindrical ; tail short. Prominent color light brown; a vertebral paler line and one lateral on 

 each side, more or less indistinct. Three series of square black spots on each side, of about 56-60 in each series, from occiput 

 to anus. Sides of head black, with a crescendo patch of yellowish posterior to the labial plates. Three and sometimes four 

 black vittae radiating from the eye across the jaws. A double white spot with a black margin on the suture of occipital plates. 

 Dorsal rows 21. 



No. 856. Pecos to Rio Grande, Texas. 1424. San Antonio, Texas. Dr. Kennerly. 



NERODIA WOODHOUSII, B. & G. 



Nerodia woodhousii, B. & G. Catal. N. Am. Serp. 1853, 42. 



SPEC. CHAR. Form of N. erythrogaster, but the head broader behind and more flattened above. Twenty-five dorsal rows of 

 scales, all carinated. Three rather large post-orbitals ; ante-orbital narrow; loral large. Three series of quadrangular dark 

 blotches on a brownish clay-colored ground. The middle series separated by narrow white lines, the latter by intervals of the 

 ground color, wider than themselves ; the three series perfect to the head. A double yellow occipital spot ; a yellow spot 

 between the superciliary and vertical plates ; an indistinct black line from the posterior rim of the eye to the angle of the 

 mouth. Abdomen unspotted. (Kennicott.) 



No. 1318. Antelope creek, Arkansas. 1325. Near Canadian river, Arkansas. H. B. 

 Mollhausen. 



NERODIA ERYTHROGASTER, B. & G. 



Coluber erythrogaster, SHAW, Gen. Zool. Ill, 1804, 458. 



Tropidonotus erythrogaster, HOLBROOK, N. Am. Herp. 2d ed. Ill, 1842, 33; pi. viii. 



Nerodia erythrogaster, B. & G. Catal. N. Am. Serp. 1853, 40. 



SP. CH. Head elongated, narrowing forwards; occipital region flattened ; convex on the snout. 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 carinated. Uniform dark bluish black above, lighter on the sides ; a lateral or external band of dull blue extending on 

 the abdominal scutellae. 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. icoodfwusii, in young 

 specimens. 



No. 1324. Fort Smith, Arkansas. Dr. Shumard. 



HETERODON NASICUS, B. & G. 



Heterodon nasicus, B. & G. Stansbury s Expl. 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. 1280. Near Canadian, Arkansas. Mollhausen. 

 66 



