92 COLTTBRID^. 



3. Leptodira nigrofasciata, (Plaie V. fig. 2.) 



Leptodira nigrofasciata, Gunth. Ann. 8/- Maff. N. S. (4) i. 1868, 



p. 425, and Biol. C.-Am., Rept. p. 169 (1895). 

 mystacina. Cope, Proc. Amer. Philos. Soo. xi. 1869, p. 151; 



Giinth. Biol. C.-Am. p. 169. 

 Sibon nigrofasciatum, Cope, Bull. U.S. Nat. Mus. no. 32, 1887, p. 67, 



and Proc. U.S. Nat. Mus. xiv. 1892, p. 678. 

 mystacinum. Cope, Bull. U.S. Nat. Mus. no. 32, p. 67. 



Eostral twice as broad as deep, just visible from above ; intet- 

 nasals much shorter than the praefrontals ; frontal once and two 

 thirds as long as broad, a little longer than its distance from the 

 end of the snout, shorter than the parietals ; loreal as long as 

 deep or a little longer than deep ; one prseocular, in contact with 

 or narrowly separated from the frontal, with or without a small 

 subocular below it ; two postoculars ; temporals 1+2; eight upper 

 labials, fourth and fifth or third, fourth, and fifth entering the eye, 

 sixth sometimes touching the parietal ; four or five lower labials in 

 contact with the anterior chin-shields, which are as long as or a 

 little shorter than the posterior. Scales in 19 rows. Ventrals 

 170-196 ; anal divided ; subcaudals 56-70. Above wdth dark brown 

 spots or semiannuli separated by narrow whitish ones, the first 

 across the occiput ; labials black-spotted ; a blackish streak on each 

 side of the head, passing through the eye ; lower parts white. 



Total length 480 millim. ; tail 100. 



Isthmus of Tehuantepec ; Nicaragua. 



a. 3 {Y. 170; C. 70). Nicaragua. Dr. Seeman [P.]. (Type.) 



b. S (V. 196 ; 0. 64). Tapana, Tehu- Prof. F. Sumichrast [0.] ; 0. 



antepec. Salvin & F. D. Godman, 



Esqs. [P.]. 



c. ? (V. 188 ; 0. 66). Tehuantepec Dr. A. C. BuUer [0.]. 



City. 



4. Leptodira frenata. 



Sibon frenatum. Cope, Proc. U.S. Nat. Mus. ix. 1886, p. 184, & 



xiv. 1892, p. 677. 

 Leptodira frenata, Oiinth. Biol. C.-Am., Sept. p. 173 (1895). 



Frontal twice as long as broad ; loreal subquadrate ; one praeooulay , 

 not reaching the frontal, with a small subocular below it; two 

 postoculars; temporals l-|-2; nine upper labials, fourth and fifth 

 entering the eye. Scales in 23 rows. Ventrals 188 ; anal divided ; 

 subcaudals 69. Black above, with narrow grey cross-bands (one 

 scale in width), which may be broken up and alternate on the 

 vertebral line ; head grey, densely mottled with blackish, occiput 

 pale greyish ; a black streak on each side behind the eye ; upper 

 labials with black borders. 



Total length 305 millim. ; tail 66. 



Jalapa, Mexico. 



