SPELERPES. 303 
Body moderately stout, with 12 or 13 costal grooves; the length of the head to 
the gular fold is one-third of the distance of the latter from the vent. Head longer 
than wide. Limbs well developed, digits entirely connected by membrane. Tail 
cylindrical, longer than the body. The series of palatine teeth nearly meet in the 
middle, and do not extend outwards beyond the choane ; parasphenoid teeth confluent 
into a single group. Black; upper parts light rufous, sharply defined from the black 
sides, sprinkled with black, the black forming indistinct longitudinal bands; throat 
and chest with minute whitish specks. 
Totallength . 2. 2... 1. we. eee 125 millim. 
Length of tail. 7 
oO 
Pa 
12. Spelerpes rufescens. 
(idipus rufescens, Cope, Proc. Ac. N. Sc. Philad. 1869, p. 104; Proc. Am. Phil. Soc. xviii. 
p. 267 (1879) ; Bull. U. S. Nat. Mus. no. 32, p. 8. 
Spelerpes rufescens, Bouleng. Batr. Grad. p. 71. 
Hab. Mexico, Vera Cruz, Orizaba, Cordova, Tehuantepec (Sumichrast), Tabasco and 
Chiapas (Dugés). 
Body stout, with 12 costal grooves; head longer than wide. Limbs weak, digits 
entirely connected by membrane. ‘Tail cylindrical, shorter than the body. The series 
of palatine teeth meet nearly in the middle and do not extend outwards beyond the 
choane ; parasphenoid teeth in two approximate patches, narrowing in front and but 
little divided behind. Black, upper parts with a rufous cast; brown below, with 
white specks. (After Cope.) 
Perhaps not distinct from S. lignicolor. 
13. Spelerpes yucatanus. 
Spelerpus (Cidipus) yucatanus, Peters, SB. Ges. nat. Fr. Berlin, 1882, p. 187. 
Spelerpes yucatanicus, Bouleng. Batr. Grad. p. 72; Zoolog. Record for 1882, Rept. p. 26. 
Hab. Mexico, Yucatan (Mus. Brit. et Mus. Berol.). 
Habit rather slender; body with 12 costal grooves; head longer than wide; limbs 
rather weak, digits entirely united by a broad web; tail cylindrical. The series of 
palatine teeth sweep outwards in a curve, but not beyond the choane, and nearly meet 
in the middle; they are separated from the parasphenoid group, which is not medially 
divided. Upper parts reddish-grey, powdered with purple; lower parts and sides 
blackish, with whitish specks irregularly distributed. 
Totallength. . . . . . . . . . 107 millim. 125 millim. 
Lengthoftail . . ......). 6S, 52 Ci, 
Known from two specimens; very closely allied to S. variegatus. 
