180 COLrBKIB^. 



CoTonella ^oclmani, Giinth. Biol. C.-Am., Rept. p. 110, pi. xxxix. 

 tig. B (1893). 



Eye rather small ; snout very short. Rostral broader than deep, 

 scarcely visible from above ; internasals much broader than long, 

 about half as long as the prefrontals ; frontal once and one third to 

 once and a half as long as broad, a little longer than its distance 

 from the end of the snout, shorter than the parietals ; loreal square 

 or longer than deep ; one prae- and two postoculars ; temporals 

 1+2; eight upper labials, fourth and fifth entering the eye ; four 

 lower labials in contact with the anterior chin-shields, which are as 

 long as or a little longer than the posterior. Scales in 21 rows. 

 Tentrals 168-176; anal divided; subcaudals 72-92. Length of 

 tail three and a half to four times in the total length. Pale brown 

 above, with three or five dark brown longitudinal streaks ; head 

 dark brown, bordered with yellow spots posteriorly ; upper labials 

 dark brown with yellow spots ; yellowish beneath. 



Total length 445 millim. ; tail 130. 



Guatemala. 



a-d. S ("V. 176, 173 ; C. 88, Duefias. Messrs. Salvin & Godman 

 92), 2 (V. 176 ; C. 72), & [C.]. (Types.) 



yg. (V.170; C. 81). 



82. UROTHECA. 



Xenodon, part., Schleg. Phys. Serp. ii. p. 80 (1837). 



Urotheca, Bibr. in Ji. de la Sagra, Hist. Cuba, Bept. p. 217 (1843). 



Liopliis, part., Dum. ^ Bibr. Erp. Gen. vii. p. 697 (1854) ; Giinth. 



Cat. Col. Sn. p. 42 (1858) ; Bvcourt, Miss. Sc. Mex., Bept. p. 633 



(1886). 

 Pliocercus, Cope, Proc. Ac. Philad. 1860, p. 253. 

 Elapochroiis, Peters, Mon. Berl. Ac. 1860, p. 294. 

 Cosmiosophis, Jan, Arch. Zool. Anat. Phys. ii. 1863, p. 289. 

 Leiosophis, part., Ja7i, I. c. p. 320. 

 Gyclagras, part., Cope, Proc. Ain. Philos. Sac. xxiii. 1886, p. 488. 



Maxillary teeth 11 to 14, increasing in size posteriorly, followed 

 after a short interspace by two enlarged ones ; mandibular teeth 

 subcqual. Head scarcely distinct from neck ; eye moderate or 

 rather small, with round pupil ; usually one or more subocular 

 shields. Body cylindrical ; scales smooth, without apical pits, in 17 

 to 21 rows ; ventrals rounded. Tail long, thick throughout, ending 

 obtusely ; subcaudals in two rows. 



Cuba, Central and South America. 



Synoj^isis of the Sj^ecies. 



I. Eye in contact with two labials ; scales in 17 rows. 



A. Four lower labials in contact with the anterior chin-shields. 



Anterior chin-shields much shorter than 



the posterior : temporals l-|-2 1. dumerilii, p. 181. 



Anterior chin-shields as long as the pos- 

 terior ; temporals 1-Fl 2. lateristriga, p. 181. 



