- 



16 UNITED STATES AND MEXICAN BOUNDARY. 



fawn color are each 2 to 2| scales wide. Vertical and occipital plates narrow and elongated. Rostral 

 wide and high; prefrontals sub-quadrangular. — (Kennicott.) 



1119. San Pedro, Texas. J. H. Clark.— 1127. Eagle Pass, Texas. A. Schott.— 1132. 

 Indianola, Dr. Kennedy. 



73. DIPSAS SEPTENTRIONALIS, Kennicott 



Plate VIII, Fig. 1. 



Sp. Ch. — Body moderately slender, very much tapering anteriorly and posteriorly. Tail slender, about 

 one-fifth the total length. Head ovoid, somewhat depressed, very large; twice as wide posteriorly as the 

 neck. Crown flattened, concave behind the eyes ; temporal regions much swollen. Snout obtusely pointed, 

 scarcely more depressed than the vertical region. Vertical plate pentagonal elongated; broader in front, 

 concave on the sides. Occipitals triangular, nearly as broad as long. Superciliaries small. Rostral 

 broader than high. Nasals much larger than pre-frontals; two-thirds as high as long; emarginate above 

 to receive the exterior edge of pre-frontals. Loral smaller than upper pre-orbital ; as high as wide. Three 



pre-orbitals ; the upper more than three times as large as either of the two lower, its inner angle produced 

 to the vertical, separating the superciliary and post-frontal. Two post-orbitals; upper largest. Eight 

 upper labials; sixth and seventh four times as large as either of the three anterior ones. Ten lower 

 labials; fifth and sixth largest. Dorsal scales in 21 to 23 rows, narrow, acute posteriorly; first lateral row 

 much widest. Body above, with broad, lustrous, brownish black half rings on a light yellowish ground. 

 The black rings six to eight scales wide in the middle, narrowing very much, or even rounded off, laterally, 

 sometimes not extending quite to the abdomen. Light intervals, one or two scales wide, on the vertebral 

 region, widening to three or four times as much near the abdomen. Abdomen and lower surface of head 

 uniform light yellowish. An irregular light occipital ring. Upper labials and anterior part of head 

 brownish — lighter than the dark dorsal bands. — (Kennicott.) 



The specimen figured has the anterior sub-caudal scutellae entire, but this is a monstrosity, 

 the sub-caudal scutellae being normally all divided in this genus. 



No. 4267. Matamoras, Tarn. Lieut. Couch. — No. 2288. Brownsville, Tex. Van Vliet. 



74. EUTAENIA PKOXIMA, B. & G. 



Coluber proximus } Say, Long's Exped. 1, 1823, 187. 

 Eutainia proximo,, B. & GL Catal. N. Am. Serp. Jan. 1853, 25. 



Sp. Ch, 



faireyi. Brown or blackish above. Three longitudinal 



stripes; the dorsal ochraceous yellow or brown, the lateral greenish white or yellow on the third and 

 fourth rows of scales. Dorsal stripe covering one and over two half rows of scales. Lateral row of 

 scales usually the color of the abdomen. Total length about three and one half times that of the tail. 



Dorsal rows 19. — (Kennicott.) 



Texas. 



75. EUTAENIA OKNATA, B. & G 



Plate IX. 



parietalis 



(Not Coluber parietalis 



745. Indianola, Tex. J. H. Clark.— 438. Lower Eio Grande, Tex. J. H. Clark.— 768. 

 Near San Antonio. Dr. Kennerly. 



