In Michoacan this stream-breeding hylid occurs at elevations of 1,600 to
2,400 meters in the Sierra de Coalcoman and in the mountains rising from
the Mexican Plateau.

~Hyla eximia~ Baird

_Hyla eximia_ Baird, Proc. Acad. Nat. Sci. Philadelphia,
7:61, October 20, 1854.--Valley of Mexico. Type locality
restricted to Coyoacan, Distrito Federal, Mexico, by Smith
and Taylor (1950a:329).

_Hyla microeximia_ Maslin, Herpetologica, 13:81, July 10,
1957.--3 miles northwest of Jocotepec, Jalisco, Mexico.

Ciudad Hidalgo (36); Cuitzeo; 29 km. NW of Jacona; Jiquilpan
(2); Lago de Camecuaro (2); Lago de Patzcuaro (129); Los
Reyes; Morelia; Sahuayo (3); San Gregorio (63);
Tangamandapio (4); Temazcal (26); Tupataro; Tuxpan (15);
Undameo (2); Uruapan (20); Zacapu; Zamora (27); Zinapecuaro
(10).

More than 80 per cent of the specimens from Michoacan have brown spots
between the lateral and dorsolateral dark stripes, and more than 50 per
cent have spots between the dorsolateral stripes, at least posteriorly.
In comparison with specimens from the Valley of Mexico, those from
Michoacan have more distinct dorsolateral stripes that extend farther
anteriorly, sometimes to the eyelid, and in this respect are more nearly
like those from Jalisco and Nayarit (Taylor, 1939b:425). Some specimens
from the western part of Michoacan possess certain characters used by
Maslin (1957:81) to distinguish _Hyla microeximia_ from _H. eximia_;
nevertheless, the variation is such that two species cannot be
distinguished in Michoacan. Four series of freshly preserved specimens
have been studied in detail; in the discussion below they are arranged
from west to east; the measurement is for snout-vent length of ten males
from each sample:

_Zamora._--Twenty-two specimens (UMMZ 102083), 24.0-27.6
(26.1) mm. Dorsolateral dark stripe, or row of dashes,
present in all specimens; dark spots in lateral and dorsal
green fields; lateral dark stripe confluent with
dorsolateral stripe posteriorly in 18 specimens; white line
not extending to groin.

_Temazcal._--Thirty-five specimens (UMMZ 119162), 26.5-31.1
(28.2) mm. Dorsolateral dark stripe of row of spots present
only posteriorly in most; both dorsolateral stripes and
dorsal spots lacking in four specimens; heavy spotting
dorsally in three others; lateral and dorsolateral dark
stripes con