_—.> _ — - _ ir Hs Ni Reel 
210 COLUBRID”, 
1. Hydrocalamus quinquevittatus. 
Homalopsis quinquevittatus, Dum. § Bibr. vii. p. 975 (1854), 
Calopisma quinquevittatum, Jan, Arch. Zool. Anat. Phys. iii. 1865, 
p. 244, and Icon, Gén, 30, pl. 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; Giinth. Biol. C.-Am., Rept. p. 164 (1895) ; Bocourt, 
Miss, Sc. Mex., Rept. p. 811, pls. lv. fig. 6 & Ix. fig. 3 (1895), 
Head much depressed; snout short, rounded. Rostral broader 
than deep, just visible from above ; internasals narrowed in front, a 
little longer than broad, a little shorter than the prefrontals ; 
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 prae- and two postoculars; temporals 142; 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 line. : 
Total length 710 millim. ; tail 160. 
Mexico and Guatemala. 
a. 2 (V. 164; C. 68). Mexico. Christiania Museum. 
183. SCOLECOPHIS. 
Calamaria, part., Schleg. Phys. Serp. ii. p. 25 (1837). 
Homalocranium, part., Dum. & Bibr. Erp. Gén. vii. p. 855 (1854). 
Scolecophis, Cope, Proc. Ac. Philad. 1860, p. 259, and 1861, p. 74; 
Bocourt, Miss. Sc. Mex., Rept. p. 577 ( 1883). 
Platycranion, Jan, Elenco sist. Ofid. p. 40 (1863). 
Procinura, Cope, Proc. Amer. Philos. Soc. xviii. 1879, p. 262. 
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 Homalocranium, bein 
distinguished from the former by its smaller eye and shorter grooved 
teeth and from the latter by the presence of a loreal. ie 
