586 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
Family HY LIDAE Giinther, 1858 
Genus HYLA Laurenti, 1768 
We realize that in the great heterogeneous assemblage of nearly 
300 species which is the genus Hyla (sensu lato), several generic groups 
are usually included. Certain of these groups long associated with 
Hyla can be placed in their proper genera with little difficulty; among 
these may be mentioned Boana Gray, Plectrohyla Brocchi, Acrodytes 
Fitzinger, and perhaps Trachycephalus Tschudi. Representatives of 
Plectrohyla and Acrodytes occur in México and are recognized under 
their proper generic names. 
HYLA ROBERTMERTENSI Taylor 
Hyla robertmertenst TAyuor, Proc. Biol. Soc. Washington, vol. 50, 1937b, pp. 438-45, 
pl. 2, figs. 3-7 (Tapachula, Chiapas). 
Twenty-five specimens were secured at La Esperanza, April 5 to 
28, 1940 (U.S.N.M. Nos. 114737-114753) and Cruz de Piedra, 
April 25 and May 15, 1940 (U.S.N.M. Nos. 114754-114761), Chiapas. 
They were found on vegetation in or beside small streams. 
HYLA SMITH Boulenger 
Hyla smithit BOULENGER, Zool. Rec., vol. 38, 1902, Rept. Batr., p. 33 (Cuerna- 
vaca, Morelos). 
In all, 331 specimens of this frog were secured. The following 
specimens have been placed in the Museum collection: MoreEtos: 5 
km. south of Cuernavaca, January 24, 1939 (U.S.N.M. No. 114788); 
Puente de Ixtla, January 26-27, 1939 (U.S.N.M. Nos. 114789- 
114813). GurrrEeRo: Agua del Obispo, February 4 and August 31, 
1939 (U.S.N.M. Nos. 114814-114829); Tierra Colorada, February 
12 and August 31, 1939 (U.S.N.M. Nos. 114830-114836). Mu1cHo- 
AcAN: 4 km. north of Apatzingién, March 14-18, 1939 (U.S.N.M. 
Nos. 114836-114861). 
Near Apatzing4én males were calling from vegetation in a stream 
under a large, old, constantly dripping, overhead aqueduct. In 
Morelos they were found in banana plants. At Agua del Obispo and 
Tierra Colorada they were found in the axils of Calladium leaves 
erowing in or very near small streams. 
HYLA UNDERWOODI Boulenger 
Hyla underwoodi BouLENGER, Ann. Mag. Nat. Hist., ser. 7, vol. 3, 1899, p. 277 
(Costa Rica). 
Twenty-eight specimens were secured, from the vicinity of Palenque, 
Chiapas, July 6-9, 1939 (U.S.N.M. Nos. 114973-114978), and from 
Pozo de la Jicotea, near Piedras Negras, Guatemala, June 3-10, 1939 
(U.S.N.M. Nos. 114951-114972). 
