18 



COLUBRID.E. 



m-p. c? (V. 164; C. P) & 

 $ (V. 149, 150, 154 ; 

 C. ?, P, 114). 



q-s. rf (V. 147, 162, 151 ; 

 C. P, 119, 123). 



t. $ (V. 152 ; C. 126). 



-. rf (V. 151, 153 ; C. 



101, 125). 



w. 3 (V. 156 ; C. 117). 

 x,y. $ (V. 150, 148; 



C. ?, P). 



z. $(V. 154; C. ?). 

 a. Hgr. (V. 154; C. 120). 

 0. Skull. 



Teapa, Tabasco. 



Atoyac, Guerrero. 

 Omilteme, Guerrero. 



Sto. Domingo de 



Guzman. 

 Belize. 

 Honduras. 



Duenas, Guatemala. 



Caracas. 



Vera Cruz. 



F. D. Godrnan, Eeq. 

 [P.]. 



F. D. Godman, Esq. 



[P.]. 

 F. D. Godman, Esq. 



[P.]. 

 Dr. A. C. Buller [C.]. 



Dr. Giintlier [P.]. 

 0. Salvin, Esq. [C.]. 



58. PHRYNONAX. 



Spilotes, part., Dum. $ Bibr. Erp. Gen. vii. p. 218 (1854) ; Giinth. 



Cat. Col. Sn. p. 96 (1858) ; Jan, JSlenco sist. Ofid. p. 62 (1803; ; 



ocourt, Miss. Sc. Mex., Eept. p. 685 (1888). 

 Phrynonax, Cope, Proc. Ac. Philad. 1862, p. 348. 



Maxillary teeth 15 to 20, the posterior slightly enlarged ; anterior 

 mandibular teeth longest. Head distinct from neck ; eye large, 

 with round pupil ; no suboculars. Body elongate, compressed ; 

 scales more or less distinctly keeled, disposed obliquely on the sides, 

 in 21 to 25 rows ; ventrals obtusely angulate laterally. Tail long ; 

 subcaudals in two rows. 



Tropical America. 



Fig. 3. 



Maxillary and mandible of Phrynonax sulphureus. 



Synopsis of the Species. 

 I. Scales in 21 or 23 rows. 



A. Scales strongly keeled on the middle of the back. 



Three postoculars ; temporals 1 + 1. ... 1. sulphureus, p. 19. 

 Two postoculars ; temporals 2 + 2 .... 2. pcecilonotus, p. 20. 



B. Scales feebly keeled. 



Praeocular separated from the frontal ; 



ten upper labials 3. guentheri, p. 20. 



Pweocular separated from the frontal ; 



nine upper labials 4. lunulatus, p. 21. 



