424 MR. G. A. BOULENGER ON ORIENTAL [Apr, 28, 



no subavticular tubercles ; two metacarpal tubercles, inner large, 

 outer small. Toes moderately long, with slightly swollen tips, 

 one-third webbed or less, the web extending as a fringe along- 

 each side, and with a more or less distinct dermal ridge along the 

 lower surface ; a small, feebly prominent, oval inner metatarsal 

 tubercle. Tibio-tarsal articulation reaching eye, or between eye 

 and nostril; tibia ^, or a little less than |, length from snout to 

 vent, as long as or slightly longer than foot. Upper parts with 

 small smooth warts, lower smooth. Olive above, with dark spots, 

 marblings, or symmetrical markings, which may be edged with 

 lighter ; upper lip with dark vertical bars ; limbs with dark cross- 

 bars ; sometimes a round, white, dark-edged spot on back of 

 thighs, nearer tibia than vent ; white beneath, throat of male 

 brown. Male with an internal subgular vocal sac. 



The largest type specimen meastires 37 millim. from snout to 

 vent. The following are the measurements of an adult male 

 from Burma (one of the types) and of a female from Tonkin in 

 the British Museum : — 



6. ?. . . 



From snout to vent 30 42 millim. 



Length of head (to occiput) 10 14 „ 



Width of head 10 15 „ 



Length of snout 3j 5 ,, 



Diameter of eye 3| 5 ,, 



Literorbital width 3 4 ,, 



Diameter of tympanum 2 3 ,, 



Distance between eye and tympanum ... 1^ 2 ,, 



Forelimb 19 26 



Hand 8 11 



Hind limb 46 57 „ 



Tibia 15 19 „ 



Foot 15 18 „ 



This species was discovered in the Karin or Karennee Hills, east 

 of Toungoo, between Bui-ma and Siam, by the late L. Fea. The 

 types were obtained at Thao (1300-1400 m.) and in the district 

 of the Karin Bia-po. I refer to this species a number of speci- 

 mens from a collection made in the Man-Son Mountains (3000- 

 4000 feet) in Tonkin, on the Kwangsi frontier. These specimens 

 differ from the types only in having the web between the toes 

 less developed, being reduced to a rudiment in females, whilst 

 none of the male specimens can be said to have them more than 

 one-fourth webbed. Yet these specimens were procured during 

 the breeding-season, the abdomen of the female being distended 

 with very large ova (diameter of vitelline sphere 2 millim.). In 

 all other respects, however, the resemblance with the typical 

 M. 2}elodytoides is so great that I cannot adopt any other course 

 than to regard them as specifically identical, a course which is 

 fully justified by the amount of variation in this character 

 exemplified by M. hasseltii. 



