MEXICAN AMPHIBIANS — TAYLOR AND SMITH 597

Ovaiido at

an

elevation of 2,800 to 6,000 feet.

The

tadpoles were taken in small streams

and

the adults

were

found in the

same

general region.

The

tadpoles

may

be distinguished

by

havinga serrated edge

on

the upper beak, the posterior serrations being fanglike.

The

adults

may

be distinguished

by

the very blunt snout; the nos-

trilsat theextreme anterior end ofsnout; the areas surrounding

them somewhat

elevated; tarsal fold forming a long, free, flexible flap; toes

webbed

to the terminal disks, except

on

fourth toe,

which

has distal joint free (but with a fringe);

tympanum

almost hidden

by

thick pustulateskin; maleswith avocal sac (not without as statedinthetype description).

The maximum known

size ofthefemale is45

mm.

Most

of the 36 specimens are young.

One young

specimen

was

obtained at

Fmca

Juarez; several

young and

one adult are from

Las

Nubes, 2,900 ^feet,

on Mount Ovando,

Chiapas.

Seven

adults were collected

on Mount Ovando

at 6,000 feet.

Allwere taken in small streams, sitting

on

vegetation,

on

boulders, or, in one case, in the water.

The

single adult

from Las Nubes

is a male,

which was

calling

from

the water. Other males, as well as females, were collected at 6,000 feet, but here no

young

were seen.

Young

were very

numerous

^at

Las

Nubes,

where

they were observed sitting

on

the leavesoflow plants at the edge ^ofthe water.

A

^single

young

specimen

from

Finca Juarez

was

found undersimilarconditions.

The

voice ofthe

male

of this speciesis

much

different

from

that of P. sagorum, being asingle, sharp notethatsounds very

much

like

two

pebbles struck togetherunderwater.

The

noteisrepeatedatintervals ofabout

two

minutes.

It appears that this species lays the eggs near streams. Certainly the

young

pass through their larval stages in the streams.

Some

transforming

young

were obtained

and

one tadpoleofthespeciesisat hand.

PLECTROHYLA

SAGORUM

^Hartweg Figure 60, E; Plate 30

Plectrohyla sagorum Hartweg, Occ. Papers Mus. Zool. Univ. Michigan, No.437, June30, 1941, pp. 2-5, ^{pi. 1,figs.}1-3(MountOvando, District ofSoconusco, Chiapas, Mexico).

Hartweg

and Orton, Occ. Papers Mus. Zool. Univ.

Michigan, No.438, July 1, 1941, pp. 5-6.

This series of 18 topotypic specimens,

U.S.N.M.

Nos. 111122- 111138,

was

obtained April 15-16, 1940,

on Mount Ovando

at

an

ele- vationof 5,000 to about 7,000 feet.

The

specimens, adult

and young

transformed, were collected exclusively

from

bromelias,

which grow

in profusion at this elevation

on

the mountain.

The

eggs, however, are probably laid in water

on

the ground, as tadpoles

presumably

of this species, were obtained

by Hartweg

{loc. cit.).

598 PROCEEDINGS

OF

THE NATIONAL MUSEUM

vol.85

This species, closely related to Pledrohyla matudai,

may

be dis- tinguished

by

the sharp point

on

the snout, the cantlius rostralis distinct; skin moderately rough in males; the

web on

toes

nowhere

reaching pads, but leaving

two

joints

on

fourth toe

and

the terminal partsofother toesfree, except for a

narrow

fringe;vocal sac in male;

tympanum more

orlessvisible;

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

isaslightly

drawn

out, coarselytrilled, nasal quaaack.

The

spurs

on

thepollexdifferinthe

two

Chiapas formsof the genus.

Figure60,

D-F,

illustrates spursofbothspecies,

and

thatofP. guate- malensis.

Genus

HYLELLA

Reinhardt and Liitken, 1861 HYLELLAPICTA Gunther

Hylella picta Gunther, Biologia Centrali-Americana, Kept. Batr., 1901, pp.

286-287, pi. 73, ^fig.

C

(Jalapa, Veracruz).

Forty-fourspecimensare

from

PotreroViejo,

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)

Exerodonta sumichrasti Brocchi, Bull. Soc. Philom. Paris, ser. 7, vol. 3, No, 1,

1879, p. 20 (SantaEfigenia, Oaxaca).

HylellasumichrastiBoulenger,CatalogueoftheBatrachiaSalientias. Ecaudata

inthecollectionofthe BritishMuseum, 1882, pp.420-421.

A

series of 77 specimens

was

obtained at several localities within aradiusof50 miles ofTehuantepec, Oaxaca.

The

localities areCerro Arenal,

January

2, 1940

(U.S.N.M.

Nos. 114133-114137); Tres Cruces,

January

4, 1940 (U.S.N.M. Nos. 114138-114148);Lachiguu*i, 7,100 ^feet,

January

20, 1940 (U.S.N.M.

No.

114149); Portillo

Los

Nanches, near El

Limon,

7 leaguesnorthwest ofTehuantepec,

March

1940 (U.S.N.M. Nos. 114150-114155); "Tehuantepec,"

March

1940 (U.S.N.M. Nos. 114156-114163);

La

Concepci6n,

May

¹⁹⁴⁰(U.S.N.M.

Nos. 114164-114206);

Kio

Grande, 12K ^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.

1,Agalychnisdacnicolor(Cope): U.S.N.M. No. 116040, fromTierra Colorada, Guerrero.

3,Acrodytes ynodesta, new species: 2, U.S.N.M. No. 115021, paratype, from Cruz de Piedra, Chiapas,snout-to-vent length 61 mm.;3,U.S.N.M.No. 115013, type,same

locality,length70mm.

U. S. NATIONAU

MUSEUM

PROCEEDINGS VOL. 95 PLATE29

J^

1*

\

Plecirohyla maiudai Harlwcg: 1, E.H.T. ll.M.S. \u. 26628, male topotype from Cerro Ovando, Chiapas, snout-to-vent length 38 mm.;2,U.S.N.M. No.111120, samelocality, length 39mm.

Plectrohyla sagorum Hartweg: 1, U.S.X.M. No. 111138, topotype from Cerro Ovando, Chiapas, snout-to-vent length 41.8 mm.; 2. U.S.N.M. No. 111127,samelocality, length

45mm. »

U. S. NATIONAL

MUSEUM

PROCEEDINGS. VOL 95 PLATE 31

Agalychnismnreletii(DunuTil): 1, L.S.X.M.Xo. ¹l6U4.\ male,from Cuautlapan,\eracruz;

2, U.S.N.M.Xo. 116044. samelocaliiv. Roth aboutnaturalsize.