HYLA. 267 
with disks a little larger than those of the toes, and nearly the size of the tympanum. 
No external rudiment of pollex. Toes short, the fourth, measured from metatarsal 
joint, being two-fifths the length of the body; toes broadly webbed, the web extending 
to the disks of the fourth and fifth; a tarsal fold. Upper parts tubercular, the 
tubercles extending forwards beyond the interorbital space; abdomen coarsely, throat 
finely granular; a smooth space with a very distinct fold across the chest. No other 
folds or appendages. Upper parts brownish-olive with greyish spots; upper lip and 
limbs cross-barred, posterior face of hind limb mottled. Lower parts white; throat 
brownish or with black specks. Male with an external gular vocal sac. 
@ (Jalisco). 
Greatest width ofhead. . . . . . . . | . . . 15 millim. 
Distance of vent from snout . ....... .. 40 ~,z, 
- ” heel . . . . wee 8D 'F“g 
» » metatarsal joint. . . . . . . 47 ,, 
7 - end of fourth toe . . .. . . 6 ,, 
Boulenger has already pointed out the discrepancies in the accounts of this species 
given by Baird and himself, the Editor of the ‘American Naturalist’ (1888, p. 80) 
having identified H. affinis with H. copdi. Whilst it is still uncertain whether Baird 
had before him a distinct species, or whether his description and figure are inaccurate, 
I adopt the name given by Boulenger. 
10. Hyla boulengeri. 
Scytopsis boulengeri, Cope, Bull. U. 8S. Nat. Mus. no. 32, p. 12 (1887). 
Hab. Nicaracua (MacNeil). 
Vomerine teeth between the choanz, in two transverse fasciculi, together forming 
a series which ts convex backwards. Snout subacuminate, with canthus and sides 
concave; diameter of the eye equal to its distance from the nostril, and twice that 
of the tympanum. Choanz double the size of the pharyngeal ostia. Fingers free ; 
web between the toes short, extending to the antepenultimate phalanx of the 
fourth toe; none between first and second. Skin nearly smooth, but with numerous 
small warts on the top of the head and shoulder; abdomen areolate, throat smooth. 
(A glandular patch above the tympanum*.) Light grey, with indistinct darker 
cross-bands on the back and limbs. Concealed faces of femur and tibia light-coloured, 
with purplish-black cross-bands; several spots of the same colour in the groin. (After 
Cope.) 
* Cope does not mention this in his description, but as he refers this frog to his genus Scytopis, which is _ 
characterized by an accumulation of sebaceous glands above the tympanum, it may be supposed that the species’ 
resembles Hyla venulosa in this respect. 
