190. ELAPOMOEPHtrS. 239 



Elapoceplxalus, Oiinth. Cat. Col. iSn. p. 276 (1858). 

 Elapomorphus, Cope, Proc. Ac. Philad. 1861, p. 524. 

 Phalotris, Cope, I. c. 



Maxillary short, witli four or five smaU 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 praeocular. Body cylin- 

 drical; scales smooth, without pits, in 15 rows; ventrals rounded 

 Tan. short, obtuse ; subcaudals in two rows. 



South America. 



Synopsis of the Species. 

 I. Prefrontals paired. 



Parietals not twice as long as broad ; 



ventrals 169-188 1. blumii. p. 239. 



Parietals at least twice as long as broad ; 



ventrals 176-184 2. wuchereri, p. 240. 



Parietals not twice as long as broad; 



ventrals 190-234 3. lepidus, p. 241. 



n. A single praefrontal. 



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. lemniscattts, p. 242. 



B. Internasals not forming a median suture. 



Internasals meeting with their inner 



angles behind the rostral ; ventrals 



203 6. trilineatus, p. 243. 



Internasals completely separated by the 



rostral ; ventrals 218 7- hilineatus, p. 243. 



1. Elapomorphus blumii. ^ 



Calamaria blumii, Schkg. Phjs. Serp. ii. p. 45 (1837). 

 Elapomorphus blumii, Dum. 4r Bibr. vii. p. 841 (1854) ; Quiehen. 



in Casteln. Anim. Nouv. AmSr. 8ud, Pept. p. 56 (1856) ; Gunth. 



Ann. 8; Mag. N. H. (3) ix. 1862, p. 57 ; Jan, Arch. Zool. Anat. 



Phys. ii. 1862, p. 45, and Icon. GSn. 14, pi. iii. fig. 1 (1865) ; 



Straiich, Bull. Ac. St. PHersb. xxix. 1884, p. 551 ; Bocourt, Miss. 



So. Mex., Pept. pi. xxxvi. fig. 2 (1886). ■ 

 Elapocephalus teematus, Qiinth. 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; 



