MEXICAN AMPHIBIANS—TAYLOR AND SMITH 605 
secured on February 4, 1939, in and near the headwaters of Agua del 
Obispo. 
The specimens of this species, during the day, are ensconced in 
rocks along the edges of mountain rivulets and are rarely seen. At 
night they are occasionally found hopping among vegetation at some 
distance from the streams and are especially difficult to capture, 
owing to the rapidity of their movements. 
RANA PALMIPES Spix 
Rana palmipes Spix, Animalia nova... Brasiliam, 1824, p. 5, pl. 5, fig. 1 
(Amazon River, Brazil). 
In all, 117 specimens were found at the following localities: CHIAPAS: 
Mount Ovando, 1,200 to 6,000 feet, April 15 to May 19, 1940 (U.S. 
N.M. Nos. 113762-113777) ; Finca Judrez, May 8-10, 1940 (U.S.N.M. 
Nos. 112778-113792); Palenque, July 11-23, 1989 (U.S.N.M. Nos. 
118760-113761). Tasasco: Tenosique, June 29-30, 1939 (U.S.N.M. 
Nos. 118752-113759). Verracruz: Matacabresto, February 25, 1939 
(U.S.N.M. No. 113751); Potrero Viejo, December 21, 1938 (U.S.N.M. 
Nos. 113736-113750). GuatTrEmaua: Piedras Negras, Petén, June 
3-20, 1939 (U.S.N.M. Nos. 113793113795). 
The specimens have a brilliant-green to yellowish-green head and a 
more or less brownish body. A single specimen is an exception, in 
that it is almost black. We believe this is an abnormal condition, due 
to an infestation of parasitic mitesin the skin. It is not a discoloration 
as the black color was observed immediately in life. 
In some small rivulets this species appears in considerable numbers. 
Occasional specimens have been taken in ponds. 
RANA MONTEZUMAE Baird 
Rana montezumae Bairv, Proc. Acad. Nat. Sci. Philadelphia, vol. 7, 1854, p. 61 
(México, D. F.). 
Thirty-four specimens are from the following localities: Distrito 
FEDERAL: Xochimilco, January 25, 19389 (U.S.N.M. Nos. 113710- 
113712). Mmfxico: Lerma, December 15 and 30, 1939 (U.S.N.M. 
Nos. 113733-113734); Santa Magdalena, near Texcoco, August 23, 
1939 (U.S.N.M. Nos. 113730-113732); 15 km. west of Toluca, March 
5 and September 11, 1989 (U.S.N.M. Nos. 1137138-113727); Zum- 
pango, March 3, 19389 (U.S.N.M. Nos. 113728-113729). Mu1cuHo- 
AcAN: Sahuayo, September 14, 1939 (U.S.N.M. No. 113735). 
RANA PUSTULOSA Boulenger 
Rana pustulosa BouLENGER, Ann. Mag. Nat. Hist., ser. 5, vol. 11, 1883, p. 3438 
(Ventanas, Durango). 
Three specimens (U.S.N.M. Nos. 114006-114008) are from arroyos 
about 10 km. east of Chilpancingo, Guerrero, collected August 29, 
1939. 
