153 



1. The heel reaches at least the tip of the snout. 3. M. achatina p. 154. 



2. The heel reaches the eye or to between eye and 



tip of snout 4. M. hucostigma p. 156. 



C. Toes '/ 2 webbed. The heel reaches beyond the tip 



of the snout 5. M. annectens p. 156. 



D. Toes at least 2 / 3 webbed. 



I. The heel reaches the tip of the snout 6. M. palmipes p. 157. 



II. The heel reaches beyond the tip of the snout. 7. M. berdmorii p. 158. 



Synopsis of the Tadpoles. 



A. Distance between the eyes about 4 times that 



between the nostrils 3. M. achatina p. 1 54. 



B. Distance between the eyes about 6 times that 



between the nostrils 7. M. berdmorii} p. 158. 



I. Microhyla inornata Blgr. 



Microhyla inornata Boulenger, Proc. Zool. Soc. London, 1890, p. 37. 

 Microhyla inornata Boulenger, Vert. Fauna Malay Penins., Kept, and Batr., 

 1912, p. 259. 



Head as broad as long; snout obtuse, projecting, shorter 

 than the upper eyelid; canthus rostralis rounded, straight; 

 loreal region vertical; nostril in the middle between eye and 

 tip of snout; interorbital space broader than the upper eyelid. 

 Tips of fingers and toes feebly dilated; first finger much shorter 

 than second, which is a little shorter than fourth ; third toe 

 longer than fifth; toes free; subarticular tubercles distinct; a 

 very small, round, inner, no outer metatarsal tubercle; the 

 heel reaches the temple or the eye ; tibia 2 / 5 to V 2 length of 

 head and body. 



Back smooth or with small smooth warts. 



Grey above, spotted or marbled all over with dark brown, 

 the spots sometimes forming longitudinal streaks; sides of 

 head black, with a series of white spots on the upper lip, 

 sometimes confluent into a streak; lower parts brown, some- 

 times spotted with whitish. Length 27 mm. 



Male with an internal vocal sac. 



Habitat 1 ): Sumatra (Deli!). — Burma; Siam; Cochinchina; 

 Malay Peninsula. 



1) Boulenger (1912) must have made a mistake in mentioning Borneo among 

 the localities of this species. 



