598 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
This species, closely related to Plectrohyla matudai, may be dis- 
tinguished by the sharp point on the snout, the canthus rostralis 
distinct; skin moderately rough in males; the web on toes nowhere 
reaching pads, but leaving two joints on fourth toe and the terminal 
parts of other toes free, except for a narrow fringe; vocal sac in male; 
tympanum more or less visible; maximum size known, 45 mm. (female). 
Males were heard calling in the daytime from bromelias, and the 
call was positively traced to this species on one occasion. The call 
is a slightly drawn out, coarsely trilled, nasal qguuaack. 
The spurs on the pollex differ in the two Chiapas forms of the genus. 
Figure 60, D-F, illustrates spurs of both species, and that of P. guate- 
malensis. 
Genus HYLELLA Reinhardt and Liitken, 1861 
HYLELLA PICTA Giinther 
Hylella picta GUNTHER, Biologia Centrali-Americana, Rept. Batr., 1901, pp. 
286-287, pl. 73, fig. C (Jalapa, Veracruz). 
Forty-four specimens are from Potrero Viejo, December 21-26, 1938, 
June 13 and 26, and August 12, 1939 (U.S.N.M. Nos. 114102-114126), 
and Cuautlapan, January 16, January, February, and August 7-14, 
1940 (U.S.N.M. Nos. 114127-114132), Veracruz, where the species 
is common about permanent ponds. 
HYLELLA SUMICHRASTI (Brocchi) 
Exerodonia sumichrasti Broccui, Bull. Soc. Philom. Paris, ser. 7, vol. 3, No. 1, 
1879, p. 20 (Santa Efigenia, Oaxaca). 
Hylella sumichrastt BoULENGER, Catalogue of the Batrachia Salientia s. Ecaudata 
in the collection of the British Museum, 1882, pp. 420-421. 
A series of 77 specimens was obtained at several localities within 
a radius of 50 miles of Tehuantepec, Oaxaca. The localities are Cerro 
Arenal, January 2, 1940 (U.S.N.M. Nos. 114133-114137); Tres 
Cruces, January 4, 1940 (U.S.N.M. Nos. 114138-114148) ; Lachiguiri, 
7,100 feet, January 20, 1940 (U.S.N.M. No. 114149); Portillo Los 
Nanches, near Hl Limén, 7 leagues northwest of Tehuantepec, March 
1940 (U.S.N.M. Nos. 114150—-114155); ‘“‘Tehuantepec,’”’ March 1940 
(U.S.N.M. Nos. 114156-114163) ; La Concepcién, May 1940(U.S.N.M. 
Nos. 114164-114206); Rio Grande, 12% miles north of Niltepec, 
Oaxaca, January 26-30, 1940 (U.S.N.M. Nos. 114207-114209). 
All were found in bromelias in the hills and mountains surrounding 
the Tehuantepec plains; none was found on the plain itself, although 
bromelias occasionally are present. 
The vocal sac is absent. Occasional specimens may show a slight 
elevation on the prevomers and teeth may occasionally occur on 
them. 
