BARBOUR AND COLE : REPTILIA FROM YUCATAN. 151 



21. Leptognathus sanniola (Cope), 



Three examples from Chiclicu-Itza. Two of these were taken by L. J. Cole, 

 and one by Mr. E. H. Thompson. 



These specimens show several peculiar variations from Cope's description. 



One example has three praeoeulars on one side and two on the other. Two 



specimens have undivided anal scales, while the third specimen is incomplete 



and lacks the anal scale. These also have both more ventrals and subcaudals 



than seems typical. Cope's description calls for 156 + 55 ; while in ours the 



15 15 15 



counts run , ^ , and -— — . It is possible that the tail of 



162 + 7/ 152 + 72 lo8 + ii ^ 



Cope's specimen was broken. 



In L. dimidiata, while the anal is undivided, there are no praeoeulars and 



the ventrals count 185 - 195, subcaudals 98 — 126. 



22. Tropidodipsas sartorii (Cope). 



One example from Chichen-Itza. Agrees with var. A. of Boulenger, Cat. 



Snakes British Museum, 2, p. 297. Scales i--z — r; there is one more ven- 



191 + bi3 



tral than the maximum number cited bv Boulenger. 



23. Leptodeira yucatanensis (Cope). 

 One example taken at Chichen-ltza by Mr. E. H. Thompson. 

 The cross bands descend to the ventrals, the lateral spots are general, the 



2] 



lower surfaces immaculate. Sc. --r r- 



190 + 65 



The stomach of this specimen, about 20 inches long, contained an example 

 of Ctenosaura acanthura about 7 inches long. 



Another specimen has been received, taken also at Chichen-Itza by E. H. 

 Thompson, 189-. 



24. Himantodes gemmistratus Cope. 

 Dipsas gracillima Gunther. Biol. Cent.-Amer., Kept., 1895, p. 177, pi. 56, fig. B. 



One example from Progreso, Yucatan. Sc. ^^rr r— ; forty -four dark brown 



markings on body ; thirty-one on tail. 



An e.\ample from Chichen-Itza taken by Mr. E. H. Thompson, 189-, has 

 recently been received. 



25. Thamnophis saurita proxima (Sat). 



Three examples from La Cienaga, Progreso. Taken by L. J. Cole. These 

 were sent to Mr. Alex. G. Ruthven of Ann Arbor, Michigan, who has very 

 kindly returned the following remarks: — 



" The three specimens sent me . . . belong to the saurita group, of Garter 

 Snakes, as is shown by the position of the lateral stripe on the 3d and 4tli 



