MEXICAN AMPHIBIANS—TAYLOR AND SMITH 595 
on the fourth finger. The skin is not so strongly thickened by the 
‘““parotoid”’ gland as in nigropunctata. 
Description of type-—Adult male. Head rather flattened, the 
eyes elevated; canthus rostralis rounded, the lores somewhat concave; 
eye large, the diameter (8 mm.), greater than the distance from eye 
to nostril (5.5 mm.); length of snout, 7 mm.; interorbital distance 
(8 mm.) greater than the width of an eyelid (6.9 mm.); snout extend- 
ing about 2 mm. beyond lower lip; tympanum strongly overhung 
by a thick fold, concealing its upper edge; diameter of tympanum, 
about 4.2 mm., a little more than half the diameter of eye; a pair of 
black, elongate, vocal sacs, permanently extruded, behind angles of 
jaws. Tongue broader than long, somewhat cordiform, notched be- 
hind, very slightly free behind; vomerine teeth in two transverse, 
raised groups narrowly separated medially, the tips of the teeth 
transversely grooved, appearing bifid in profile; openings of ‘the 
mucous glands of palate in a transverse sinuous groove; choanae 
moderate in size. 
Fingers rather short, the diameters of the terminal pads of outer 
toes 5 mm., somewhat larger than the diameter of the tympanum; 
outer toes less than one-third webbed, with only a trace between 
first and second, but continued as a narrow fringe to the pads; palmar 
tubercles rather ill defined, the median somewhat bifid, the inner 
large, its dorsal portion covered with minute, brown, horny spinules 
or tubercles, subarticular tubercles moderate except distal one on 
outer finger, which is much larger than the others, nearly as wide as 
toe and more or less bifid; a few distinct supernumerary tubercles. 
Toes about three-fifths webbed; subarticular tubercles moderate; 
inner metatarsal tubercle of moderate size, rather flattened; outer 
smaller, distinct; supernumerary tubercles distinct; a thickened ridge 
of skin present suggesting a very weak tarsal fold. When limbs are 
folded, the heels overlap somewhat; tibiotarsal articulation reaches 
to middle of eye. 
Skin above with numerous small, equal-sized pustules, scattered 
equally over the dorsal surface, more numerous on sides; venter, in- 
cluding chin and underside of arm and thigh, strongly areolate; anal 
flap short, fluted, followed behind by a groove. 
Color in alcohol—Above nearly uniform lavender-brown to purplish 
brown, the pustules darker on back and blackish on sides; a few 
small black spots on the dorsal surface of femur, tibia, and foot, but 
no trace of bars; belly dirty white with numerous small black flecks or 
spots; tympanum light brown. 
Measurements in mm.—Snout to vent, 69; width of head, 25; 
length of head, 23; arm, 42; leg, 108; tibia, 34; foot, 45. 
Variation—Many of the specimens are of a lighter, lavender- 
brown color, while a few are darker, more purplish brown. None, 
