42 



NERODIA. 



verse narrow liglit bands that may be seen on the back when the 



epidermis is removed. 



Lake Huron. 147+2. — 23. 24. — (on dep.) Prof. Agassiz. 



5. IVerodia "Woodliousii, B. & G. — Dorsal rows of scales 25, 

 carinated. Three series of subquadrate black blotches, a dorsal and two 

 lateral, the latter vertically elongated. A double yellow occipital spot. A 

 yellow spot between the superciliaries and vertical plates. A black vitta 

 from posterior rim of eyes to angle of mouth. 



The head is broad behind, and tapers forwards, very much flattened 

 above. The mouth is very deeply cleft. The labials are nine above 

 and eleven below; the 5th, 6th, and 7th the largest on both jaws. 



Ground-color dusky, with a dorsal series of subquadrangular black 

 blotches, 37 to 40 in number, separated by a narrow whitish trans- 

 verse line. A lateral series of vertically elongated black blotches, 

 alternating with the dorsal series, with anterior and posterior margins 

 nearly parallel, sometimes tapering downwards and reaching the ab- 

 dominal scutellae. The fuscous space between the lateral blotches 

 is wider than that occupied by the blotches themselves. Along the 

 tail, both the dorsal and lateral blotches are small and subcircular. 

 Underneath the color is yellowish, and the scutella3 in the young, 

 margined posteriorly with black, while in the adult the middle region 

 of the scutell^ is unicolor. The head is brownish black, with a 

 double yellow spot near the commissure of the occipital plates, and 

 two spots of the same color on the commissural line between the 

 vertical and superciliaries. A black vitta extends from the posterior 

 rim of the eye to the angle of the mouth. 



Indianola. 144+1. — 25. 



Betw. Ind. & San ) ^ 14.11 C4^ '^'^ 



Antonio. 



i 



27f.— Col. J. D.Graham. 

 10|. 2f. " 



Sabinal, Tex. 



Neio Braunfels, Tex. 



142+1. 79. 25. 

 144+1. 68. 25. 



148+1. 68. 25. 

 147+1. 72. 25. 

 145+1. 70. 25. 



11. 

 13. 

 34. 

 25. 

 17. 



21. 



3. 



7^ 



4i. 



F. Lindheimer. 



