292 COLUBRID, 
cylindrical ; scales striated and keeled, with apical pits, in 19 rows ; 
ventrals rounded. Tail moderate or rather long ; subcaudals in 
two rows. Hypapophyses developed throughout the vertebral 
column. 
Central America; North-western South America. 
Synopsis of the Species. 
Subcaudals 75-101; five or six upper . 
labigha esc ohicc mics: ea ao Barre ea 1. diadematus, p. 292. — 
Subcaudals 100 ; seven upper labials, pos- 
ABFIOE MOPEOIIES, 5 cise ¥en XS bared sipmipis ad 2. labiosus, p. 293. 
Subcaudals 37-67 ; seven or eight upper 
BPRS 2 3, cbicctl shies Wd a nw yelalt-o UN Oe ne 3. atratus, p. 293. 
1. Streptophorus diadematus. 
Ninia diademata, Baird § Gir. Cat. N. Am. Rept. p. 49 (1853); 
Cope, Proe. Ac. Philad. 1860, p. 340. 
Streptophorus bifasciatus, Dum. § Bibr. vii. p. 520 (1854) ; — 
Cat. p. 16 (1858) ; Cope, Proc. Ac, Philad, 1 60, p. 77; Jan, Are 
Zool, Anat. Phys. ii. 1863, p. 26, and Icon. Gén. 12, pl. iii. fig. % 
ees) Bocourt, Miss. Se. Mev., Rept. p. 545, pl. xxxii. fig. 10 
(1883 
Rostral about once and a half as broad as deep, visible from 
above; internasals and supraoculars small; frontal as broad as 
long, as long as its distance from the end of the snout, shorter than 
the parietals; loreal once and a half to twice as long as deep; two 
postoculars ; temporals 1+ 2 or 2+3; six (exceptionally five) upper 
labials, third and fourth entering the eye, sixth longest; four lower 
labials in contact with the anterior chin-shields; posterior chin- 
shields small. Scales in 19 rows, all strongly keeled. Ventrals 
136-156; anal entire; subcaudals 75-101. Dark brown or 
blackish grey above, usually with a light spot on each of the outer 
scales ; upper lip and occiput yellowish ; the yellowish collar may — 
be interrupted in the median line; belly and lower surface of tail 
yellowish, with three longitudinal series of large black spots, or 
black with a light border to each shield. 
Total length 415 millim.; tail 125. 
Mexico. 
a. 2 (V. 142; C. 83). Mexico. M. Sallé [C.}. 
b-e. 5 (V. 140, 148; C. Huatuzco, Vera Cruz. F. D, Godman & O, 
96, 101) & 9 (V. 156, Salvin, Esqrs. [P.]. 
5 Me! OY. 487 Oo T Tab Mr. H. H.Smith{C 
gr. 18 ea abasco. Mr. H. H.Smith{[C. }. 
92). oe F. D.Godman & 
Salvin, eich (P.}. 
g-h. Agr. d (V.140, 147; Oaxaca. Mr. Hoege [ 
C. 87, 97) 
