AGAMA FLAVIMACULATA. 113 
rule, when agamoicl lizards have been placed in alcohol. The general colour, according 
to Audouin, was represented as a greenish yellow passing into olive ; there were 
longitudinal series of well pronounced brown spots along the back, and similarly 
coloured transverse bands on the tail. The upper surface of the head and the pouch 
were of a beautiful brilliant blue. In connection with this account of the colours, it is 
noteworthy that the lizards from Lower Egypt here referred to A. flavimaculata are 
called by the natives "the blue judge of the desert" : as I have never seen it alive, 
I cannot say to what extent blue prevails. 
This species has been regarded by some herpetologists as identical with A. leucostigma, 
Keuss. Through the kind permission of Professor Boettger I have examined the two 
types of the latter, both of which were from Upper Egypt. In them the nostril is 
situated on the canthus rostralis ; the head is short and broad, the ear is smaller 
than the eye and has a fringe of 2 or 3 small pointed scales along its upper border. 
The body is depressed and covered with small, more or less imbricate, smooth or 
indistinctly keeled scales, with much larger scales scattered among them, each scale 
being more or less keeled and sometimes pointed. Limbs covered with imbricate 
keeled scales, some of which are larger than the others. Limbs moderately developed ; 
the fore limb when laid forwards has the wrist nearly between the nostril and the eye, 
while the hind limb (fourth toe) reaches the ear. The third finger is shorter than the 
fourth, and the fifth than the second ; the third toe is shorter than the fourth, and the 
fifth does not extend as far as the first. Tail rounded, covered with keeled scales, 
with larger ones intermixed on the base. Ventral scales small, smooth. No gular 
pouch. Its depressed body, the marked difference between the small and large scales, 
the smooth ventrals, and the absence of a gular pouch are all features of A. pallida, 
with which it appears, as I have already said, to be identical. 
In the description I have given of the lepidosis of A. flavimaculata I have described 
the scales as unequal or rarely nearly equal. An illustration of the latter is the female 
from Kafr Amar, figured on PI. XL fig. 3, which recalls the figure of A. savignyi ; but 
there is a young specimen from the area between Suez and Ismailia in which the scales 
have the same character. This specimen presents the peculiar banded coloration 
with enclosed triangular pale dorsal areas. Another specimen from the same locality, 
with similar coloration, has the scales distinctly unequal, and in this respect it 
leads into other and larger specimens, in which the scales are still more unequal 
and in which the coloration is uniform. In the first and smallest of these specimens 
the scales are convex and obtusely keeled, in the second the convexity is less marked, 
while in the third the scales are still more flattened, the keels sharp, terminating in a 
fine point and tending to become mucronate. These equal or nearly equal scaled 
lizards are the forms which lead into A. tournevillii. 
One specimen considerably larger than any of those already considered, viz. a 
male, measuring 92 millim. from snout to vent, with a proportionally longer head 
