Calotes mystaceus
Upper
head-scales smooth or feebly keeled, imbricate, scarcely enlarged on
supraorbital region; a few small spines on each side of the head above the
tympanum; latter measuring at least half the diameter of the orbit. Gular sac
small; gular scales feebly keeled, as large as dorsals. An oblique fold in
front of the shoulder. Dorso-nuchal crest well developed in the male,composed
of falciform spines directed backwards, the longest measuring the diameter of
the orbit; it gradually decreases in height on the back, being reduced to a
mere denticulation on the sacrum. 45-53 scales round the middle of the body;
dorsal scales keeled, nearly twice as large as ventrals, all directed upwards
and backwards; ventral scales strongly keeled. The adpressed hind limb reaches
the tympanum or the posterior border of the orbit; fourth finger slightly
longer than the third. Tail a little compressed, at the base with a slightly
serrated upper ridge. Olive above, frequently with large transverse red spots
on the back; lips yellowish.
From Wikipedia.
