6 TYPHLOPIDZE. 
58 times in the total length; tail once and a half as long as broad, 
rounded. 22 scales round the body. Dark brown; head and anal 
region whitish. 
Total length 158 millim. 
Costa Rica. 
¥ 3. Helminthophis petersii. (Pare I. fig. 1.) 
Sere petersii, Bouleng. Ann. § Mag. N. H. (6) iv. 1889, 
p- . 
Rostral half the width of the head, extending to between the 
eyes, truncate posteriorly, and forming a broad suture with the 
frontal ; two superposed preeoculars and a subocular; eye distin- 
guishable under the ocular; four upper labials, first largest, third in 
contact with the subocular. Diameter of body 55 times in the 
total length; tail a little longer than broad, ending in a spine. 20 
scales round the body. Brown, each scale darker in the centre; 
snout and anal region yellowish. 
Total length 110 millim. 
Ecuador. 
a. Guayaquil. Mr. Fraser [C.]. (Type.) 
4, Helminthophis guentheri. (Prarz I. fig. 2.) 
Helminthophis guentheri, Bouleng. Ann, § Mag. N. H. (6) iv. 1889, 
p- 361. 
Rostral one third the width of the head, extending to the level of 
the eyes, rounded posteriorly and forming a suture with the frontal, 
which is very broad; a single preocular; no subocular; eye dis- 
tinguishable under the ocular; four upper labials, first largest, third 
in contact with the ocular. Diameter of body 50 times in the 
total length; tail twice as long as broad, ending in a spine. 20 
scales round the body. Olive-brown above, head white; yellowish 
inferiorly, with small scattered olive spots. 
Total length 170 millim. 
Brazil. | 
a, Ad, Porto Real, Prov, Rio Janeiro. MM. Hardy du Dréneuf 
be (‘Type.) 
b-c, Ad. Porto Real. M. Hardy du Dréneuf 
[C.]. 
5. Helminthophis albirostris. 
penta eae albirostris, Peters, Mon. Berl. Ac. 1857, p. 402. 
Liotyphlops albirostris, Peters, Sitz. Ges. naturf. Fr. isi, p- 69; 
Bocourt, Miss. Se. Mex., Rept. p. 501, pl. xxx. fig. 1 (1882). 
Tae) (Idiotyphlops) emunctus, Garman, N. Am. Rept. i. p. 8 
