dorsum pustulate.

~Allophryne ruthveni~ Gaige

_Allophryne ruthveni_ Gaige, Occas. Papers Mus. Zool., Univ.
Michigan, 176:1-3, pl. I, Oct. 14, 1926. Crawford, Annals
Carnegie Mus., 21(1):32, Nov. 14, 1931. Ruthven,
Herpetologica, 1:3, July 11, 1936. Barbour and Loveridge,
Bull. Mus. Comp. Zool., 96(2):64, Feb., 1946. Peters, Occas.
Papers Mus. Zool., Univ. Michigan, 539:10, Sept. 19, 1952.

_Holotype._--University of Michigan Museum of Zoology 63419,
adult female, from Tukeit Hill, below Kaiteur Falls, Equibo
District, British Guiana; obtained in May, 1924, by E. N.
Clarke.

_Diagnosis._--Fingers free; toes two-thirds webbed; no
supernumerary tubercles on soles or palms; no tarsal fold;
elongate anal sheath, anal opening on lower surface of
thighs; head broad, interorbital space 2.5 times width of
upper eyelid; snout subacuminate in dorsal profile, strongly
sloping in lateral profile; tympanum visible in males,
concealed in females; venter areolate.

_External Morphology._--(Fig. 1) _Additional features not
mentioned in diagnoses_: Head wider than long, about as wide
as body; supratympanic fold present; canthus rostralis
rounded, loreal region slightly concave, nearly vertical;
nostril at tip of snout; pupil horizontal; no teeth on
maxillary, premaxillary, or vomer; tongue small, round,
thick, not notched behind, free posteriorly for one-sixth of
length; choanae large, only partly visible from directly
below; males having darkened subgular vocal sac; vocal slits
present in male.

Axillary membrane lacking or but slightly developed; no
tubercles or ridge under forearm; two palmar tubercles;
subarticular tubercles small, simple, round, flattened; tips
of fingers slightly expanded, T-shaped, with prominent
transverse groove; first finger shorter than second (stated
as longer than second in diagnosis by Gaige, 1926:2); folds
extending laterally from anus for a short distance, then
downward to venter of thighs; no appendage on heel, no inner
or outer tarsal folds or tubercles; inner metatarsal
tubercle oval, about twice as long as wide; outer metatarsal
tubercle nearly absent; no supernumerary tubercle on sole;
subarticular tubercles on foot small, round, simple, and
diffuse; toes T-shaped, slightly wider than digit;