190. ELAPOMORPHUS. 239 
Elapocephalus, Giinth. Cat. Col. Sn. p. 276 (1858). 
Elapomorphus, Cope, Proc. Ac. Philad. 1861, p. 524. 
Phalotris, Cope, 1. ¢. 
Maxillary short, with four or five small teeth, followed, 
after an interspace, by a pair of large grooved fangs situated 
below the eye; mandibular teeth subequal. Head small, not 
distinct from neck; eye minute, with round pupil; nostril in a 
single nasal, which is in contact with a preocular. Body cylin- 
drical ; scales smooth, without pits, in 15 rows; ventrals rounded 
Tail short, obtuse ; subcaudals in two rows. 
South America. 
Synopsis of the Species. 
I. Preefrontals paired. 
Parietals not twice as long as broad; 
Vonttals 16BS1SS ee eee ec nce 1. blumiz. p. 239. 
Parietals at least twice as long as broad ; 
ventrals 176-184 ...........0008. 2. wuchereri, p. 240. 
Parietals not twice as long as broad; 
ventrals 190-234 ..... eemoneee tee 3. lepidus, p. 241. 
II. A single prefrontal. 
A. Internasals forming a suture behind the rostral. 
Portion of the rostral visible from above 
not longer than the suture between 
the internasals; ventrals 202-240 .. 4. tricolor, p. 241. 
Portion of the rostral visible from above 
longer than the suture between the 
internasals ; ventrals 185-212...... 5. lemniscatus, p. 242. 
B. Internasals not forming a median suture. 
Internasals meeting with their inner 
angles behind the rostral; ventrals 
BOT ee BOTs caree ties era D 6. trilineatus, p. 248. 
Internasals completely separated by the 
rostral; ventrals 218 ............ 7. bilineatus, p. 248. 
1. Elapomorphus blumii. 
Calamaria blumii, Schleg. Phys. Serp. ii. p- 45 (1837). 
Elapomorphus blumii, Dum. § Bibr. vii. p. 841 (1854); Guichen. 
an Casteln. Anim. Nouv. Amér. Sud, Rept. p. 56 (1855); Giinth. 
Ann. § Mag. N. H. (3) ix. 1862, p. 57; Jan, Arch. Zool. Anat. 
Phys. ii. 1862, p. 45, and Icon. Gén. 14, pl. iii. fig. 1 (1865); 
Strauch, Bull. Ac. St. Pétersb. xxix. 1884, p. 551; Bocourt, Miss. 
Sc, Mex., Rept. pl. xxxvi. fig. 2 (1886). 
Elapocephalus teniatus, Giinth. Cat. p. 276 (1858), 
Rostral a little broader than deep, the portion visible from above 
measuring one third to one half its distance from the frontal ; 
