APPENDIX C. 159 



7th, which do not meet above it. Lower labials 9 ; 4th and 5th 

 largest. Two rows of temporal shields. Two lorals in one speci- 

 men, one in another. General color above deep black ; some of the 

 scales having dashes of reddish white at their bases, scarcely indi- 

 cating blotches as in Scotopliis: the same color is sometimes shown 

 on the skin. Beneath slate-black. The color is uniform on the pos- 

 terior half : the bases of the scutellae then begin to exhibit more or 

 less of pale reddish white, which tint increases in extent and in- 

 tensity anteriorly until towards the head the slate-color is only seen 

 along their edges, the tint there being a dark salmon-color. The pos- 

 terior margins of the upper and lower labials, as well as all the plates 

 on the sides of the neck and beneath, are edged with well-defined 

 black. Sides of the head reddish brown, margined as above. 

 Eagle Pass, Tex. 193. 60. 17. 45|. 7f. Arthur Schott. 



« 193. 56. 17. 48J. 9|. " 



9. ©pllibolus Sayi, B. & G Page 84 



Variety with transverse penultimate bands. 



Eagle Pass, Tex. 210. 59. 23. S7§. 5|. Arthur Schott. 



10. Masticopliis flavigularis, B. & G Page 99 



Mr. Clark mentions having seen specimens of this species on the 

 upper Rio Grande, with a decided tinge of red. It would not sur- 

 prise us, therefore, to find it the same with Coluber tesiaceus, Say — a 

 point of much interest, as this is the only one of Say's Western spe- 

 cies which we have not identified as clearly distinct. 



Presidio del Norte, Mex. 200+1. 1G7. 17. 56. 15i. John H. Clark. 



11. Masticopliis ornatus, B. &G Page 102 



A highly marked specimen, diff"ering somewhat from those already 

 described. Very dark purple on the back, lighter on the sides be- 

 tween the light lines. A narrow yellow line along the contiguous 

 edges of the abdomen and outer dorsal rows. The 4th row of scales 

 with the adjacent edges of the od and 5th, are yellowish white, with 

 a well-defined black line through the centre of the former. Down 

 the centre of all the rows as well as the fourth, is a black line, 

 most intense on the 1st and 3d rows. At successive intervals along 



