2iO COLUBKIDiE. 



1. Hydrocalamus quinquevittatus. 



Homalopsis quinquevittatus, Ihim. Sr Bihr. vii. p. 975 (1854). 



Calopisma quinquevittatum, Jan, Arch. Zool. Anat. Phys. iii. 1865, 

 p. 244, and Icon. G&n. 30, pi. ii. (1868). 



Hydrops lubricus, Cope, Proc. Ac. Philad. 1871, p. 217. 



quinquevittatus, Garm. N. Am. Rept. p. 36 (1883). 



Hydrocalamus quinquevittatus, Cope, Proc. Amer. Philos. Soc. xxii. 

 1885, p. 176 ; Gunth. Biol. C.-Am., Rept. p. 164 (1895) ; Bocourt, 

 Miss. Sc. Mex., Rept. p. 811, pis. Iv. tiff. 6 & Ix. fig. 3 (1895). 



Head much depressed ; snout short, rounded. Eostral broader 

 than deep, just visible from above ; internasals narrowed in front, a 

 little longer than broad, a little shorter than the prsefrontals ; 

 frontal twice as broad as the supraocular, once and two thirds as 

 long as broad, longer than its distance from the end of the snout, 

 shorter than the parietals ; loreal, if present, longer than deep ; 

 one prse- and two postoculars ; temporals 1+2 ; eight upper labials, 

 fourth and fifth entering the eye ; five lower labials in contact 

 with the anterior chin-shields, which are as long as or shorter than 

 the posterior. Scales in 21 rows. Ventrals 151-164 ; anal 

 divided; subcaudals 65-71. Dark brown or blackish, with two 

 pale brown longitudinal bands, or brown with a black lateral band; 

 outer row of scales and a portion of the second white ; lips white, 

 each shield with a round black spot ; ventral shields white, each 

 with two transversely oval black spots forming two regular longi- 

 tudinal series ; on the posterior half of the tail the spots unite to 

 form a zigzag liue. 



Total length 710 miUim. ; tail 160. 



Mexico and Guatemala. 



a. S ("V. 164 ; C. 68). Mexico. Christiania Museum. 



183. SCOLECOPHIS. 



Oalamaria, part., ScKleg. Phys. Sei-p. ii. p. 25 (1837). 

 Homalocianium, part., Dum. ^ Bibr. Erp. Gin. vii. p. 855 (1854). 

 Scolecophis, Cope, Proc. Ac. Philad. 1860, p. 259, and 1861, p. 74 ; 



Bocourt, Miss. 8c. Mex., Rept. p.. 677 (1883). 

 Platyoranion, Jan, Elenco sisi. Ofid. p. 40 (1863). 

 Procinura, Cope, Proc. Amer. Philos. Soc. xviii. 1879, p. 263. 



Maxillary teeth 13 to 15, small, equal, followed by a pair of 

 feebly enlarged grooved teeth situated below the posterior border of 

 the eye ; mandibular teeth equal. Head slightly distinct from 

 neck ; eye small, with round pupil. Body cylindrical ; scales 

 smooth or feebly keeled, without apical pits, in 15 rows ; ventrals 

 rounded or obtusely angulate laterally. Tail short ; subcaudals in 

 two rows. 



Central America. 



This genus connects Erythrolamprus with Homaloeranium, being 

 distinguished from the former by its smaller eye and shorter grooved 

 i«eth and from the latter by the presence of a loreal. 



