596 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
however, shows any trace of a black dorsal pattern. Many show no 
trace of the black flecks or spots on the top of femur and tibia; one 
very light, fawn-colored specimen from the Gulf drainage of Tabasco 
(Tenosique, U.S.N.M. No. 115009) is tentatively referred to this 
species. 
Remarks.—During the wet season in Chiapas specimens were found 
calling at night in a tree about 12 feet above the ground. The call isa 
loud, raucous, grinding noise that lasts for perhaps a second. It is 
sometimes repeated twice or thrice, and then follows a long period of 
silence. 
The skin secretion was very meager, perhaps owing to the season. 
No irritating effect on the skin or nasal membranes was noticed; how- 
ever, none of it was placed directly on the membranes. 
Genus PLECTROHYLA Brocchi, 1877 
The fortunate revival of the generic name Plectrohyla demands the 
allocation of another generic name which like Plectrohyla is based upon 
a species with a more or less conspicuous pollex. ‘This is the genus 
Boana Gray (1825, p. 214), which proves even more strongly differen- 
tiated from Hyla (sensu lato) than Plectrohyla, and certainly is not 
congeneric with the latter, despite superficial similarities. Plectrohyla 
differs from the older Boana in the character of the vomerine teeth 
(which approach those of Hyla); the pollex bones do not pierce the 
flesh, and there are perhaps other less obvious characters. 
The genus Boana > may be defined as a group having a pollex rudi- 
ment more or less developed, a single subgular vocal sac; and vomerine 
teeth which form curved or angular series (rarely diagonal) tending to 
converge anteriorly. Perhaps some 20 species, all South American, 
are referable to the genus. ‘To the Central American and Mexican 
genus Plectrohyla belong six forms described at present: 
Plectrohyla miliaria (Cope) Plectrohyla guatemalensis Brocchi 
Plectrohyla ixil Stuart Plectrohyla matudai Hartweg 
Plectrohyla quecchi Stuart Plectrohyla sagorum Hartweg 
PLECTROHYLA MATUDAI Hartweg 
FicureE 60, D; Pate 29 
Plectrohyla matudat Hartwse, Occ. Papers Mus. Zool. Univ. Michigan, No. 4387, 
June 30, 1941, pp. 5—9, pl. 1 (Mount Ovando, District of Soconusco, Chiapas) .— 
Tayutor, Univ. Kansas Sci. Bull., vol. 28, pt. 1, No. 8, May 15, 1942a, pp. 
39-40. 
A series of 28 topotypes (U.S.N.M. Nos. 111094-111121), including 
both adults and larvae, was collected April 15-16, 1940, on Mount 
8 Genotype [Rana] boans Linnaeus (1758, p. 213) from ‘‘America’’ (= Hyla boans Daudin, 1803, p. 21, pl. 11, 
from ‘‘Surinam’’). The name Hypsiboas Wagler (1830, p. 200) (genotype, Hyla palmata) was chosen by Cope 
for this genus. Apparently he was unaware of Gray’s name. 
