268 



10. Philautus Gistel. 



(Gistel, Naturg. Thierr., 1848, p. X; Stejneger, Proc. U.S. Nat. Mus., 



XXVIII, 1905, p. 346). 



Ixalus (nom. preocc), Dumeril et Bibron, Erpet. gen., Paris, VIII, i84i,p. 523. 



Leptomantis Peters, Monatsber. Akad. Berlin, 1867, p. 32; Poche, Zool. Anz., 



XXVI, 1903, p. 700. 



Pupil horizontal. Tongue deeply notched and free behind. 

 Vomerine teeth none. Tympanum distinct or hidden. Fingers 

 free or webbed, toes webbed; tips of fingers and toes with 

 disks. Outer metatarsals separated by a groove or narrow web. 



Omosternum and sternum with a bony style. An inter- 

 calary ossicle between the penultimate and terminal phalanges; 

 the latter obtuse or bifurcate. 



This genus is hardly distinguishable from R/iacophorus, as 

 in Rh. edentulus the vomerine teeth may be absent; perhaps 

 both genera should be united, as Hylella with Hyla. 



Distribution: S.E.-Asia, including the western part of 

 the Indo-Australian Archipelago. 



Synopsis of the Species. 



A. Toes nearly entirely, two outer fingers half 



webbed 1. Ph. biinaculatus p. 269. 



B. Toes not more than 2 / 3 , fingers not or feebly 

 webbed. 



I. Tympanum at least 2 / 3 the width of the eye. 

 Fingers free. 



1. Toes half webbed 2. Ph. pictus p. 269. 



2. Toes webbed at the base. 



a. Skin of upper parts tubercular 3. Ph. flavosignatiis p. 270. 



b. Skin smooth 4. Ph. anodon p. 271. 



II. Tympanum not more than half the width of 



the eye. 



1. Heel reaching beyond the tip of the snout. 



a. Toes half webbed. Tympanum '/ 3 or 



2 / 5 the width of the eye. 



a.. Interorbital space broader than upper 



eyelid. .Disks of fingers smaller than 



tympanum 5. Ph. longicrns p. 272. 



(3. Interorbital space broader than upper 

 eyelid. Disks of outer fingers larger 

 than tympanum 6. Ph. jacobsoni p. 272. 



