268 DR. MALCOLM SMITH ON 



ill Bangkok chiefly in artificial collections of water, such as in the 

 large jars used bj' the Siamese for growing lotuses, or in the open 

 tanks where rain-water is stored for use. Being thus independent of 

 rainfall, the larvae may be found throughout the year. 



Flower has described the Bangkok specimens as having five 

 series of teeth in the upper lip, whilst the Malayan form has only four. 

 Both forms, however, are to be found in this country, and are equally 

 common. Similarly, the upper series of teeth in the lower lip may be 

 continuous or narrowly interrupted. The yellow spot on the tip of the 

 nose is present in all Siamese individuals, and is usually very conspic- 

 uous in life. I have seen it in specimens from as far south as Patani. 



A batch that I obtained last August from Prabat, differed in 

 colour from all the specimens that I have seen before, in that the up- 

 per part of the head and body was of a dark uniform grey, and there 

 was a broad vertical band of the same colour near the end of the tail. 

 Some others obtained at Ta Rua, a tew miles distant, at the same 

 time, were of normal colouration. 



Microhyla ornata Bouleng. 

 Flower, P.Z.S., 1899, p. 1)02, pi. LX. 



By far and away the commonest of the Micruhijla tadpoles in 

 Bangkok. They may be found in almost every suitable deposit of 

 water, and at any time of the year, except perhaps in April and May 

 at the end of the dry season. 



Flower's specimens measured 20 mm. in total length, and that 

 is usual for full grown ones. I obtained some from Koh Lak (Pen. Siara) 

 last year, however, which measured 29 nun. in length, head and body 

 10. The tail, as a rule, is deeper than he has figured it. 



Microhyla butleri Bouleng. 



" Traiispan'iit tadpoles", FIuw.t, P./.S., 1809, p. 903, pi. LX, Hg. 2. 

 Annandale has recently suggested* that Flower's " traneparent 

 tadpoles" from Penang, are probably those of If. henhnorii. He may be 

 right, as the larva of this frog is still unknown, but tadpoles that 1 

 liave bred out on several occasions and which agree entirely with 

 Flower's description, belong to M. liuUvri. Most ot the Siamese speci- 



« Jleni. Asiiit. Sop. Bengal, VI, p. 151 (1917). 



JOUKN. NAT. HIST. SOC. SIAM. 



