1899.] REPTILES or THE MALAY PENINStJLA AND SIAM. 641 



white speckled with red ; so far as I have observed, it is only 

 in the males that the pouch becomes distended. In January 

 [Chantaboon] the males had the head, neclv. upper arms, and fore 

 part of the body diffused with bright red, which gave them a 

 striking appearance. In spirits the gular pouch becomes hardly 

 noticeable. Iris reddish brown. Inside of mouth flesh-colour. 



Size. The largest individuals of their respective sexes, out of a 

 large series that I have measured, are : — 



fe 6 from Alor Star, Kedah. Total length 376 mm. (snt. to vnt. 

 95 ; tail 281). 



$ from Sepoy Lines, Penang. Total length 332 mm. (snt. to 

 vnt. 86 ; tail 246). 



The nuchal spines attain a length of 5*2 mm. 



Hah. Afghanistan, Beloochistan, India, Ceylon, Burma, Siam, 

 South China, Malay Peninsula. 



65. Calotes EMMA Gray. 



Calotes emma, Blgr. Cat. Liz. i. p. 324, pi. xxv. fig. 1. 



I have obtained one specimen from Chantaboon. Also a lizard, 

 said to have been caught in Bangkok, d , total length 296 mm. 

 (snt. to vnt. 84 ; tail 212), with about 72 scales round the middle 

 of the body, which I sent to the British Museum, " appears to be 

 an abnormal C. emma," on the authority of Mr. Boulenger. 



Hab. Burma, Siam. 



66. Calotes mtstacetjs D. & B. 



Calotes mystaceus, Blgr. Cat. Liz. i. p. 325. 



M. Mouhot obtained a specimen in Cambodia, and I received 

 two from Chantaboon. 



Hah. Ceylon, Burma, Nicobars, Siam, Cambodia. 



67. Phtsxgnathus mentageb Glinth. 



Physignathus mentager, Giiuth. Eept. Bx'it. Ind. p. 153, pi. xv. ; 

 Blgr. Cat. Liz. i. p. 400. 



Siamese. " King-kar-kong." 



This fine lizard was described from a specimen obtained at 

 Chantaboon by M. Mouhot, who also got the species at Pachebone. 

 I received one from Chantaboon, and though the tip of the tail 

 was broken off it measured in total length 620 mm. (snt. to vnt. 

 250 ; tail 370) ; it had eleven enlarged shields on either side of the 

 throat. 



In the Siamese Museum is a rather smaller specimen with ten 

 enlarged shields on either side of the throat. 



Hah. Siam. 



N.B. — Physignathus cochinchinensis (Guerin). 

 Physignathus cochinchinensis, Blgr. Cat. Liz. i. p. 399. 

 This lizard is known from Cochinchina, so may possibly also 

 occur in Siam, A lizard in the Siamese Museum, labelled by 



