128 REPTILES AND BATRACHIANS 



Dorsals in seventeen rows ; ventrals two hundred and 

 eleven ; anal bifid ; subcaudals seventy-one pairs. 



mn DoiDiujn 9no Bi&naev j aesjn; 

 RHINOCHILUS TESSELLATUS Garm., 1883. 



Coahuila, Mex. 



Scales in twenty-three rows ; veutrals one-hundred and 

 seventy-eight ; subcaudals thirty-seven entire plus fourteen 

 pairs. 



,8881 <.Mnsyt) MUJUOiir&aT AMO 

 OPHIBOLUS MULTISTRATUS Kenn., 1860. 



San Luis Potosi, Mex. 



Dorsal rows twenty-three '; ventrals two-hundred ; sub- 

 caudals fifty-five pairs ; dark trans verse bands sixty-two on 

 body, seventeen on tail ; total length thirty-one and five- 

 eighths inches, tail five and one-eighth. Another speci- 

 men has ventrals one hundred and ninety-five ; subcaudals 

 fifty-six pairs ; black bands sixty plus sixteen. Kennicott 

 says of the type "the black rings extend but a short dis- 

 tance upon the abdominal scuta, leaving the abdomen des- 

 titute of blotches, though it is faintly and sparsely punc- 

 tulated." Our specimens have more of the dark color on 

 the belly. 



TANTILLA CORONATA B. & G., 1853. 



San Luis Potosi, Mex. 



Dorsal rows fifteen ; ventrals one hundred and fifty-four ; 

 anal bifid ; subcaudals sixty-three pairs. The type speci- 

 men from Mississippi had ventrals one hundred and forty- 

 three, and subcaudals thirty-five pairs. The specimens 

 described by Dumeril and Bocourt, from Mexico, have 

 one hundred and seventy-two to one hundred and seventy- 

 seven ventrals. One from Beaufort, North Carolina, has 

 ventrals one hundred and thirty-three, anal bifid, and fifty- 

 one pairs of subcaudals. 



