640 MK. STANLEY S. FLOWER ON THE [May 16, 



The Indiau Changeable Lizard, known as the " Chameleon " by 

 the English in Siam and as the " Bloodsucker " in Ceylon, does 

 not seem to extend to the southern portion of the Malay Peninsula, 

 though it is numerous in Kedah (both at Alor Star and at Kulim) 

 and fairly common in Penang near sea-level, and I have obtained 

 one specimen in the hills there at an elevation of 2200 feet. 

 Dr. Hanitsch records a specimen from the Province Wellesley 

 (Rep, Eaffles Libr. & Mus. 1897, p. 9). 



In Siam this is the commonest Agamoid ; there are specimens 

 in the British Museum from Pachebone collected by M. Mouhot, 

 and I have met the species in Bangkok, Ayuthia, Pakpreo, Hinlap 

 (Dong PhyaFai, elevation 700 feet),Tahkamen, Kabin, Chantaboon, 

 and on the island of Kosichang. 



Description. In Siamese specimens I have counted from 42 to 57 

 scales round the middle of the body. 



Colour (in life). Upper surfaces nearly uniform pale brown 

 (either greyish, olive, yellowish, or rufous), with five to seven more 

 or less distinct darker brown transverse bands on the back (these 

 sometimes do not meet symmetrically in the centre line of the 

 back), which are interrupted by a more or less strongly defined 

 light (white, bufE, or bright yellow) dorso-lateral longitudinal line 

 (about 1| to 2 scales wide) ou each side, which line reaches from 

 the neck to the tail, where it gradually disappears ; these light 

 longitudinal lines may be bordered abo\e and below by very narrow 

 black lines. The upper surfaces of the limbs and digits are cross- 

 barred with brown. The tail is frequently ringed with dai-k 

 brown, the dark rings being nearly black anteriorly and about 

 twice the width of the pale interspaces. Lower surfaces very 

 pale buff, frequently with faint darkish lougitudiual lines on the 

 neck, down the centre of the abdomen, and under the thighs. 



A noticeable and apparently constant feature of this species is 

 the dark lines radiating from the eye, and the top of the head is 

 more or less marked. 



Typical Bangkok specimens have well-defined rich dark brown 

 markings on the head, as follows : — 



A faint chevron (pointing backwards) on the snout, 3 indistinct 

 cross-bars on the forehead, two fine crescentic lines (pointing 

 backwards) joined by a transverse line behind the eyes, a pair of 

 black spots on the nape (with a very small white spot in the centre 

 and another outside each) ; both upper and lower labials alternately 

 light and dark ; 9 lines radiate from the eye, one goes forwards 

 and downwards to the upper labials, another goes backwards and 

 downwards to the upper labials and is continued in the same 

 direction on the lower jaw, another is directed to the tympanum, 

 another is directed backwards and upwards and converges with its 

 fellow on the opposite side, meeting on the back of the neck at 

 about the eighth nuchal spine ; there is another cross-bar on the 

 neck at about the twelfth nuchal spine. 



The yular pouch at certain times of year (noted in May [Kedah] 

 aud in November [IlinlapJ) is very conspicuous, eing white, or 



