1896.] BATBACHIANS OF THE MALAY PENINSULA. 869 



males were more plentiful than females. Of over twenty specimens 

 examined, the largest male was 200 mm. in total length (H.B. 77, 

 tail 123), and 86 mm. in extent across its extended " wings " ; and 

 the largest female was 193 mm. in total length (H.B. 75, 

 tail 118). Some of the females contai ned four rich-yello w-coloured 

 leatbery-skinned eggs about 5 by 4 mm. 



Mr. Ridley found this species at the Bindings. 



Life-coloration. — In Cantor's description he does not mention 

 the differences between the male and female ; in my specimens I 

 found these both noticeable and constant. 



Male. Front part of upper surface of head sea-green, with a 

 black spot between the eyes. General colour of upper surfaces 

 light bronze-brown, mottled all over with spots and patches of 

 rich red-brown, dark brown, and black ; in some lights fugitive 

 metallic green shades are seen. Some of the markings are more 

 definite than others : these are a median black spot on the nape 

 of the neck, a cluster of black spots in front of the shoulders, two 

 broken transverse black bands across the body, and a pair of black 

 spots in front of hips. 



Under surfaces of head, body, and limbs are brownish-buff 

 minutely spotted with dark brown, and metallic green shades ftre 

 frequent and vivid. The gular pouch is brilliant yellow. 



Tail bronze- brown with rings of dark brown. 



"Wing-membrane — of the upper surface the portion nearest the 

 body is of the same light bronze-brown as the back, mottled with 

 dark brown, beyond this the ground-colour is orange-red, and the 

 markings get larger and darker, till towards the margin they 

 coalesce and the light ground-colour cannot be seen. Eound the 

 margin of the parachute is a narrow border of light brown speckled 

 with black. The under surface varies from pale cobalt to bright 

 blue, with pink patches and large bars and dots of black. 



Female. Differing from the male as follows : — 



(i.) Front part of upper surface of head very dark brown or 

 grey (black spot as in male). 



(ii.) The gular pouch is blue or green, minutely speckled viith 

 black. 



(iii.) Where the ground-colour of the upper surface of the wing- 

 membrane is orange-i-ed in the male, it is rich yellow in the 

 female. 



(iv.) The uuder surface of the wing-membrane is greenish- 

 yellow, there are no pink patches, and the black bars and 

 spots are larger. 



These Lizards when at rest on the trunk of a tree, usually in a 

 vertical position, are almost invisible, owing to tlieir dark mottled- 

 brown colour, but when darting through the air overhead they 

 resemljle a flashing blue gem, owing to the bright colours of the 

 underneath of the " wings." They are very active and nimble, 

 spreading their parachute as they leap from any point, and alight- 

 ing gently on all fours closing it as they touch the ground. They 



