HYLA. 273 
dark cross-bands. Lower parts uniform whitish. Male with a non-retractile vocal sac 
behind each angle ot the mouth. 
(Tampico). 
Greatest width of head . . . . . . . ).).) .) ~~) 25 millim. 
Distance of vent from snout . . . . . . . . .) 680g, 
» » heel . 2. 2... . OBC, 
- ” metatarsal joint . . . . . . 84  ,, 
» » end of fourth toe. . . . . . Ills, 
This species shows a somewhat perplexing amount of variation in the shape of the 
vomerine series, size of the tympanum, development of cuticular glands, and coloration. 
In many Mexican specimens the coloration during immaturity is peculiar: the light 
lateral band is pure white, and many of the tubercles on the sides of the body and on 
the legs are deep black (H. lichenosa). Boulenger has described a living specimen :— 
“When handled, it exuded a great quantity of poisonous fluid ..... ; this fluid, 
of a milky appearance, coagulates instantaneously, sticking to the fingers in a very 
disagreeable manner; it has a strong odour, resembling that of peaches, and affects 
very disagreeably the mucous membrane of the nostrils, causing a strong itching.” 
18. Hyla sordida. 
Hyla sordida, Peters, MB. Ak. Wiss. Berlin, 1863, p. 460. 
Hab. Panama, Veraguas. 
Vomerine teeth in two short transverse series, between the choanz, which are a 
little larger than the eustachian ostia. Snout with rounded canthus, obtuse, the 
diameter of the eye being equal to its distance from the end of the snout; distance 
between the nostrils a little less than their distance from the eye. Diameter of the 
tympanum one-third that of the eye. The three outer fingers are almost entirely 
webbed, and even the two inner fingers are connected by a rudimentary membrane. 
The web between the toes is much excised, but reaches to the disks, leaving free only 
one-half of the last phalanx of the fourth toe. Disks of toes and fingers nearly equal. 
When the hind limb is carried forwards, three-fourths of the tarsus reach beyond the 
end of the snout. Upper parts smooth, lower granular. Bluish-grey, sides of the body 
and posterior face of the thighs finely marbled with white and brown; limbs with 
cross-bands. Lower parts white. Male with a subgular vocal sac. (After Peters.) 
Width of head . . . ww. ee ee ee 2 milli. 
Length of body . . . 2... we eek BA, 
7 hindlimb . ....... 2... . 60, 
7 foot . 2. 2. 2. 2. ee eee ee ee 27, 
To judge from the description, this frog must be most closely allied to Hyla gabbi, 
and may be even specifically the same. The only noteworthy difference seems to be 
