BATRACHIANS FROM SOUTHERN ANNAM. 



437 



bead, shorter and more rounded snout, and absence of external 

 metatarsal tubercles. 



This frog was common on the Plateau, and numerous specimens 

 were obtained at between 1500 and 2000 metres elevation. 



Rana gjraminea Boulenger. 



P. Z. S. 1899, p. 958, pi. Ixvii. fig. 1 ; id., Rec. Ind. Mus. xx. 

 p. 204, June 1920. 



Boulenger's description was drawn up from male specimens 

 only. A fine series from the Plateau shows that the females 

 are much larger than the males, some of them being twice as 

 large. The specimens differ from the types in the snout being 

 longer than the eye, and in the nostrils being distinctly nearer 

 the tip of the snout than the eye. Females have a propor- 

 tionately smaller tympanum than males. 



Colour. Above bright green to dark olive, or greyish-brown, 

 uniform or with large darkish spots. Eelow white, uniform or 

 pow-dered with grey. Females usually light greyish-brown above, 

 seldom bright green, and conspicuously spotted on the back and 

 limbs. 



This frog was common on the Plateau at all elevations above 

 1500 metres. 



Measurements of R, graninea in mm. 

 Author's Nos.... 2515 2513 2518 2526 2647 2506 2509 2510 2648 2649 

 Snout to vent ... 58 53 56 ' 45 40 105 101 89 79 72 



Head 22 20 20 17 15 35 31 29 27 25 



Width of head... 20 18 18 16 14-5 35 35 32 27 25 j 



Snout 10 9 9 7 6-5 17 16 14 13 11 



Eye 9 7 7 5'5 5-5 11 11 10-5 8 8 



Interorbital....;. 4-5 4-5 4-5 4 3-5 9 9 8 8 6 



Tjrmpanum 4'5 4 4-5 3'5 4 6 5 4-5 4 4 



Arm 35 34 34 31 30 66 66 60 52 49 



Leg 96 94 94 85 76 190 190 168 150 150 



Tibia 32 32 30 29 25 65 65 59 52 53 



Foot 28 28 27 24 22 54 54 46 46 44 



MicROHYLA piCTA Sclilegel. 



Yerh. Nat. Ges. Basel, xiii. 1901, p. 151, fig. 



Known from a single specimen in the Basel Museum. 



Dr. Roux has kindly compared one of my specimens with it, 

 and considers them to be identical. In general characters 

 M. picta agrees so closely with M. rubra from India that, were it 

 not for the distinctive colouration of the two forms and their 

 geographical distribution, it would be diflicult to separate them. 

 Comparing my specimens with examples of M. rubra in the 

 British Museum, I find the following ditterences :— Snout (of 

 picta) a little moi'e obtuse, tibio-tarsal articulation reaching to 

 posterior border of eye, web of toes slightly fuller. 



