184, HOMALOCRANIUM. 219 
H. wagneri, Jan, from Florida, which is referred'to the synonymy 
of H. coronatum by Cope, differs in having the symphysial in contact 
with the anterior chin-shields, and an undivided anal shield. 
Loennberg also notes a specimen from Florida in which the first 
pair of lower labials do not come in contact on the median line, 
although very close together. 
6. Homalocranium rubrum. 
Tantilla rubra, Cope, Journ. Ac. Philad. (2) viii. 1876, p. 144. 
Homalocranium rubrum, Bocourt, Miss. Sc. Mex., Rept. p. 590, 
pl. xxxvii. fig. 6 (1883); Giinth. Biol. C-Am., Rept. p. 155 
(1895). 
Eye not half as long as the snout. Rostral much broader than 
deep, visible from above; internasals about half as long as the 
prefrontals; frontal hexagonal, obtuse-angled in front, acute-angled 
behind, once and one third to once and a half as long as_ broad, 
longer than its distance from the end of the snout, shorter than 
the parietals; nostril between two nasals, the posterior of which is 
in contact with or more or less narrowly separated from the pree- 
ocular; two postoculars; temporals 1+1; seven upper labials, 
third and fourth entering the eye; first lower labial in contact with 
its fellow behind the symphysial; four lower labials in contact 
with the anterior chin-shields, which are longer than the posterior. 
Scales in 15 rows. Ventrals 149-179; anal divided; subcaudals 
59-70. Uniform red above ; back of head and nape black, with a 
yellow bar across the occiput; snout and upper lip behind the eye 
yellow ; lower parts yellowish white. 
. Total length 390 millim.; tail 90, 
Mexico. 
a. do (V.179; C. 70).  Orizaba. 
6. Yg.(V. 154; C. 59). Tapana, Tehuantepec. §M. Sumichrast [C.]; 
: F. D. Godman and 
O. Salvin, Esqrs. 
P 
Pah, 
e-d: 2 (V. 155, 153; S. Mexico. F. D. Godman, Esq. 
C.?, 65). bth 
7. Homalocranium semicinctum. 
Homalocranium semicinctum, Dum. § Bibr. vii. p. 862 (1854); Jan, 
Arch, Zool. Anat. Phys. ii. 1862, p. 53, and Icon. Gén. 15, pl. ii. 
fig. 6 (1866). 
laticeps, Gtinth. Proc. Zool. Soc. 1860, p. 240. 
—— supracinctum, Peters, Mon. Berl. Ac. 1863, p. 272. 
Tantilla laticeps, Cope, Proc. Ac, Philad. 1866, p. 74. 
semicincta, Cope, l. ¢. 
Homalocranium lineatum, Fischer, Oster-Progr. Akad. Gymn. Hamb. 
1883, p. 6, pl. —. figs. 6-8, 
Eye not half as long as the snout. Rostral much broader than 
