170 



Ù. A. fiOULENOÉIi 



Synopsis of the species of the Genus Hylambates. 



I. - Toes slightly webbed at the base (not more than one third webbed); 



lingers free; tibio-tarsal articulation not reaching the eye. 



A. Tibio tarsal articulation not reaching 

 beyond the axil; tibia not one third 

 the length of head and body; metatarsal 



tubercle oval, feebly prominent . . . \. H. cassinoides, Blgr. 1903. 



B. Tibio-tarsal articulation reaching be- 

 tween the shoulder and the posterior 

 border of the eye; tibia more than one 

 third the length of head and body; 

 metatarsal tubercle strong, compressed. 



1. Tips of fingers and toes very slight- 

 ly dilated. 



Foot not more than half the length 

 of head and body; metatarsal tubercle 



nearly as long as the inner toe . . . 2. H. bocagii, Gthr. 1864. 



Foot not more than half the length 

 of head and body; metatarsal tubercle 



much shorter than the inner toe . . 3. IT. anchietae y Bocage, 1873. 



Foot more than half the length of 

 head and body 4. iT. marginatiis, Bocage, 1895. 



2. Tips of fingers and toes as much 

 dilated as in Hyla arborea; metatarsal 



tubercle much shorter than the inner toe 5. H. hyloides, Blgr. 1906. 



II. - Toes at least half webbed. 



A. Fingers free; toes half webbed. 



1. Metatarsal tubercle strong, very 



prominent 6. J?, argenteus, Pfeff. 1893. 



2, Metatarsal tubercle small, feebly 

 prominent. 



Tibio-tarsal articulation reaching the 

 tympanum; vomerine teeth on a level 



with the posterior border of the choanae 7. H. maculatus, A. Dum. 1853. 



Tibio-tarsal articulation reaching the 

 eye; vomerine teeth just behind the 



level of the choanae 8. if. leonardiy Blgr. 1906. 



B, Fingers with a mere rudiment of web. 



1, Toes half webbed, three distal 

 phalanges of fourth toe and two of 

 fifth free. 



a. Metatarsal tubercle oval, not com- 

 pressed. 



Tibio-tarsal articulation reaching the 

 tympanum 9. if. ragazziiy Blgr. 1896. 



