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Show 1896.] BATRACHIANS O F T H E M A L A Y PENINSULA. 869 males were more plentiful than females. Of over twenty specimens examined, the largest male was 200 m m . in total length (H.B. 77, tail 123), and 86 m m . in extent, across its extended " wings " ; and the largest female was 193 m m . in total length (H.B. 75, tail 118). Some of the females contained four rich-yellow-colourecl leathery-skinned eggs about 5 by 4 m m. Mr. Ridley found this species at the Dindings. Life-coloration.-In Cantor's description he does not mention tbe differences between the male and female; in m y specimens I found these both noticeable and constant. Mcde. 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 are 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. Round 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 with black. (iii.) Where the ground-colour of the upper surface of the wing-membrane is orange-red in the male, it is rich yellow in the female. (iv.) The under 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 their dark mottled-brown colour, but when darting through the air overhead they resemble 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 alighting gently on all fours closing it as they touch the ground. They |