140 
ZOOLOGY OF THE FAR EAST. 
SOME FROGS CONFUSED WITH RANA TYTLERI AND 
RANA ERYTHRAEA. 
Under this heading I propose to consider the species confused under the names 
of R. tytleri and R. erythraea in the Fauna of India. In subsequent papers cited in 
the text Boulenger has pointed out that several of these are distinct. I have also 
included several allied forms in the same category, as I find great confusion among 
the specimens of them in the Indian Museum. All these frogs are slender species of 
moderate size and with well-marked discs at the tips of the digits. The colour of 
the back as a rule contrasts strongly with that of the sides. 
Key to the Frogs of the Rana erythraea group that occur tk Burm.a .^nd the 
B.w of Bengal. 
I. Skin of back more or less granular. 
.\. Granules on back minute, evenly distributed. 
1. Granulation even; no pale vertical streak on sides of 
head; sides of body dark, reticulated with white; 
ventral surface with dark markings or suffusions 
2. Granules on back more minute and more sparsely scat- 
tered ; no pale vertical streak on side of head ; sides 
uniformly dark ; ventral surface pale 
B. Granules on back relatively large, confiried to posterior region, 
scattered, a pale vertical streak between tympanum and eye; 
sides pale, with a few black spots or streaks ; ventral surface pale 
II. Skin of back smooth or minutely pitted. 
A. Web of hind foot not reaching the discs of any of the toes; an 
outer metatarsal tubercle present on foot. 
I. Toes not more than half webbed, very long and slender. . 
z. Toes more than half webbed, moderate. 
a. A white ridge or fold extending upwards and for- 
wards from behind the shoulder to the upper 
edge of the tympanum 
b. Sides oi head uniformly dark; a pale longitudinal 
streak in the middle of the posterior part of the 
back 
B. Web of hind foot reaching the discs of all the toes but the fourth. 
1. No outer metatarsal tubercle; snout considerably longer 
than orbit ; whole of ventral surface pale . . 
2. An outer metatarsal tubercle present. 
a. Throat darkened, with a pale longitudinal streak, 
snout considerably longer than orbit 
b. Throat not darkened; snout barely longer than 
orbit 
I.SLAND.S of the 
R. granulosa. 
R. nicobariensis. 
R. leptoglossa. 
R. inacrodactyla. 
R. lateralis. 
R. tytleri. 
R. erythraea. 
R. alticola. 
R. nigrovittata. 
Rana leptoglossa (Cope). 
i868. Hylorana leptoglossa, Cope, Proc. Nat. Sci. Philadelphia, p. 139. 
To this species I assign three specimens taken many years ago in Pegu by 
Stoliczka . 
