165. lALTEIS. 137 



165. IALTEIS. 



Philodryas, part., OUnth. Cat. Col. Sn. p. 123 (1868). 

 laltris, Cope, Free. Ac. Fhilad. 1862, p. 73. 



Maxillary teeth 14, increasing in size, the last large and fang- 

 like and followed, after a considerable interspace, by a pair of 

 large grooved fangs situated just behind the posterior border of the 

 eye ; the five or six anterior mandibular teeth increasing in length 

 and followed by a toothless space. Head distinct from neck, with 

 distinct canthus rostralis ; eye rather large, with round pupil. 

 Body cylindrical ; scales smooth, with apical pits, in 19 rows ; 

 Tentrals rounded. Tail long ; subcaudals in two rows. 



Santo Domingo. 



Maxillary and mandible of laltris dorsalis, 



1. laltris dorsalis. (Plate VII. fig. 2.) 



Philodryas dorsalis, Giinth. Cut. p. 126 (1858). 



laltris vultuosa, Cope, Proc. Ac. Philad. 1862, p. 73 ; Qarm. Proc. 



Atmt. Philos. Soc. ixiv. 1887, p. 284. 

 Dromicus raentalis, Giinth. Ann. Sr Mag. N. H. (3) ix. 1862, p. 128, 



pi. ix. fig. 9. 

 Jaltris dorsalis, Cope, Proc. Amer. Philos. Soc. sviii. 1879, p. 273. 



Eostral nearly twice as broad as deep, scarcely visible from 

 above; internasals as long as broad, nearly as long as the prse- 

 frontals ; frontal once and two thirds to twice as long as broad, 

 longer than its distance from the end of the snout, shorter than the 

 parietals ; loreal a little longer than deep ; one praeocular, not 

 reaching the frontal ; two postoculars ; temporals 1 + 2 ; seven 

 upper labials, third and fourth entering the eye ; four lower labials in 

 •contact with the anterior chin-shields, which are much shorter than 

 the posterior. Scales in 19 rows. Ventrals 180-188 ; anal divided ; 

 subcaudals 102-110. Olive above, with large black blotches 

 anteriorly which may be wholly or partially confluent, posteriorly 

 with small irregular light spots ; yellowish beneath, speckled with 

 olive, with or without small blackish spots. 



Total length 1090 millim. ; taD 360. 



Santo Domingo. 



a. cJ (V. 180 ; 0. 102). S. Domingo. M. Sallg [0.1. (Type.) 



4. (S (V. 181; 0. 110). ? (Type of D. mentalis.) 



