190. ELAPOMORPHUS. 243 
p. @ (V. 212; C. 24). High Pampas of EE. W. White, Esq. 
San Luis, Men- [C.]. 
doza. 
q. Skeleton. Rio Grande do Sul. 
6. Elapomorphus trilineatus. (Prats X. fig. 3.) 
reap trilineatus, Bouleng. Ann. § Mag. N. H. (6) iv. 1889, 
p. 266, 
Rostral as deep as broad, the portion visible from above 
measuring two thirds its distance from the frontal, in contact with - 
the anterior angle of the single prefrontal; internasals meeting 
with their inner angles; frontal once and a half as long as broad, 
not quite so long as its distance from the end of the snout, much 
shorter than the parietals, which are twice as long as broad; one 
pre- and two postoculars; temporals 1+1; six upper labials, 
second and third entering the eye, fifth largest; four lower labials 
in contact with the anterior chin-shields, which equal the posterior 
in size. Scales in 15 rows. Ventrals 203; anal divided; sub- 
caudals 26. Cream-colour; above with three black streaks inter- 
rupted by the pale borders of the scales, the middle one on the 
vertebral row of scales, the lateral between the fourth and fifth 
rows ; a blackish transverse band on the base of the tail; ventrals 
and subcaudals black antero-mesially. 
Total length 530 millim. ; tail 45. 
Southern Brazil. 
a. 2 ~ 208 ; C. 26). Camaquam River, Rio Dr. H. v. Dheriing [C.]. 
Grande do Sul. (Type.) 
7. Elapomorphus bilineatus. 
Elapomorphus bilineatus, Dum. § Bibr. vii. p. 839 (1854) ; Jan, 
Arch, Zool. Anat. Phys. ii. 1862, p. 44, pit ‘Icon. Gén. 14, pl. ii. 
fig. 1 (1865) ; Strauch, Bull. Ac. ‘St. Pétersb. xxix. 1884, p. 568; 
Bocourt, Miss. Sc. Mex. , Rept. pl. xxxvi. fig. 3 (1886). 
Phalotris bilineatus, Cope, ‘Proc. Ac. Philad. 1861, p. 524. 
Rostral as deep as broad, the portion visible from above a little 
shorter than its distance from the frontal and entirely separating 
the internasals; prefrontal single; frontal a little longer than 
broad, shorter than its distance from the end of the snout, much 
shorter than the parietals, which are not twice as long as broad ; 
one pre- and two postoculars ; temporals 1+1; six upper labials, 
second and third entering the eye; four lower labials in contact 
with the anterior chin-shields, which are as large as the posterior. 
Scales in 15 rows. Ventrals 218; anal divided; subcaudals 21. 
Brownish yellow above, with a blackish line on each side of the 
back, between the fourth and fifth rows of scales; head blackish 
above and beneath; ventrals and subcaudals blackish, edged with 
whitish. 3 
Total length 348 millim. ; tail 20. 
Corrientes, Argentina. 
R2 
