MEXICAN AMPHIBIANS—TAYLOR AND SMITH 593 
lected. At that time they were plentiful in the bromelias. On the 
occasion of this visit only the single specimen was found in a day’s 
collecting. 
HYLA species 
A specimen of Hyla taken on the mountain above Acultzingo on 
August 11, 1940, was cataloged in the Museum collection (U.S.N.M. 
No. 115056), but this has since been misplaced and cannot be found 
at the present time. 
The field notes of Smith on this specimen read: ‘‘Green form, prob- 
ably new, about the size of Hyla arborescandens Taylor but with the 
fingers half webbed.” 
Genus ACRODYTES Fitzinger, 1843 
The tree frogs having the vocal sacs set back behind the angle of the 
jaw seem to form a natural hylid group. Moreover, as pointed out by 
Cope, there is a parotoid gland covering much of the dorsal surface of 
head and shoulders. The skin secretions, which have a quality irritat- 
ing to mucous membranes, are apparently different from those pro- 
duced by other species of tree frogs. This combination of characters 
appears to set this group completely off from Hyla. 
In 1862 Cope (1862, p. 354) proposed the genus Scytopis for Scytopis 
hebes, which is (fide Boulenger, 1882, p. 365) a synonym of Rana 
venulosa Laurenti=Hyla venulosa Daudin. Since Acrodytes was pro- 
posed in 1843 (Kitzinger, 1843, p. 30), having as genotype Hyla venu- 
losa Daudin=Rana venulosa Laurenti (1768, p. 31 ‘‘Indiis’’), this 
name must take precedence over Cope’s Scytopis for this group. 
ACRODYTES SPILOMMA (Cope) 
PLATE 27, Fiagure 1 
Hyla spilomma Corps, Proc. Amer. Philos. Soc., vol. 17, 1877, p. 86 (Cosamaloa- 
pan, Veracruz). 
A series of 31 specimens was acquired from the following localities in 
México: San Luis Potosi: U.S.N.M. No. 114979, Rio Coy, near 
Pujal, December 8, 1938. Veracruz: U.S.N.M. Nos. 114980- 
114990, Potrero Viejo, December 21-29, 1938; U.S.N.M. No. 114991, 
10 miles east of San Juan de la Punta, December 28, 1938; U.S.NM. 
Nos. 114992-115000, 115004-115008, Cuautlapan, January 4-16, 1939, 
and August 7-14,1940;U.S.N.M. Nos. 115001-115003, Tezonapa, Jan- 
uary 11, 19389. Curapas: U.S.N.M. No. 115020, Cruz de Piedra, 
near Acacoyagua, April 25, 1940. 
This series shows very little structural variation, and the color 
and pattern variation is likewise small. The dorsal pattern consists 
of a black or brownish-black stripe on each side, in the dorsolateral 
region sometimes broad enough to cover the back, and widening pos- 
