MEXICAN AMPHIBIANS—TAYLOR AND SMITH 583 
U.S.N.M. No. 114053, Huichihuayan, San Luis Potosi, December 12, 
1939. 
Some of the characteristics of these specimens differ from those 
recorded for the type. The back is somewhat pustular or tubercular, 
but the pustules may be small, giving the skin a very smooth appear- 
ance. The type description mentions the spots on the back as being 
large. In these the spots are small and not especially distinct. The 
tympanum is somewhat less than half of the diameter of the eye. The 
ventral disk is evident and its posterior part is indistinctly granular. 
The largest specimen is a female containing large ovarian eggs. It 
measures 22.4 mm. in length. The specimen from San Luis Potosi is 
referred here tentatively. It may actually belong to another species, 
but is small and may not show all the adult characters. It was found 
5 km. north of Huichihuayén in a rotten log, in a field overgrown with 
shrubs and weeds. 
Potrero Viejo specimens were found under stones in a pasture. 
Those from Piedras Negras were found hopping on the ground at 
night but certain ones were found under stones during the day. Color 
notes (Smith) state “light areas on the dorsum are yellow-green in 
color.”’ Two of the Piedras Negras specimens were taken from the 
stomach of a snake (Drymobius m. margaritiferus). 
SYRRHOPHUS RUBRIMACULATUS, new species 
Type.—U S.N.M. No. 114070, collected at La Esperanza, Chiapas, 
May 13, 1940, by Dr. and Mrs. Hobart M. Smith. 
Paratypes.—U.S.N.M. Nos. 114054—114069, 114071, 114072, topo- 
types, collected between April 5 and May 25, 1940; U.S.N.M. No. 
114073, Rancho Las Gradas, Oaxaca, May 20, 1940. 
Diagnosis.—A small species with a known maximum size of 22.5 
mm. length, having a dark purplish or purplish-brown coloration, beset 
with small reddish spots on head and back. The tympanum a little 
less than one-third of the eye; first finger shorter than second, the 
outer palmar tubercle wanting; length of the free part of the fifth toe 
contained in the length of the fourth, three times; tibiotarsal articu- 
lation to middle of eye; choanae not concealed by the overhanging 
maxillary shelf when seen from below. 
Description of type.-—Adult male. Head oval, wider than the body, 
the width (8 mm.) slightly less than the length (8.2 mm.) ; tympanum 
a little higher than wide, the upper part of the rim indistinct, its longi- 
tudinal diameter contained in the length of eye three times; snout 
(3.2 mm.) a little longer than eye (8.15 mm.); width of an eyelid 
(2 mm.) about equal to the narrowest interorbital distance (2.13 mm.) ; 
nostrils slightly removed from the tip of the snout, the distance be- 
tween them being 1.9 mm., their distance from the eye 2.73 mm.; 
