1899.] REPTILES OF THE MALAY PENINSULA 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, neck', 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. 



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

 large series that I have measured, are : — 



S4 S from Alor Star, Kedah. Total length 376 mm. (snt. to vnt. 

 95 ; tail 281). 



5 from Sepov Lines, Penang. Total length 332 mm. (snt. to 

 vnt. 86 ; tail 246). 



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



Hab. Afghanistan, Belooehistan, India, Ceylon, Burma, Siam, 

 South China, Malay Peninsula. 



65. Calotes EMMA Gray. 



Calotes emma, Blgr. Cat. Liz. i. p. 324, pi. xsv. 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 mtstaceus D. & B. 



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



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

 two from Chantaboon. 



Hab. Ceylon, Burma, Nicobars, Siam, Cambodia. 



67. Phtsignathus mentagee Gunth. 



Phi/signathus mentager, Giinth. Eept. Brit. Ind. p. 153, pi. xv. ; 

 Blgr. Cat. Liz. i. p. 4U0. 



Siamese. " King-kar-kong." 



This fine lizard was described from a specimen obtained at 

 Chantaboon by M. Mouhot, Avho 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. 



Hab. Siam. 



N.B. — Physignathus cochinchinensis (Guerin). 

 PTiysignathus 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 



