576 MR. G. A. BOULENGER ON THE VARIETIES OF 
IE 2. 3. + 5. 6 
gio Uo Gel Nynes ec 6 5 om Oe 78 28 10 39 23 
3 . 64 90 27 11 86 23-22 
ne oF G64 83 27 10 31 20 
9 eb 64 80 30 10 35 20 
: ie 61 80 BG 10 88 20-19 
“ ‘ eee en NTS p10 21 
eles Draconeras) .smnn-nL-en mn OLE 77 27 13 37 24-23 
es +5 56 75 29 10 32 24, 
¢. I. la Guardia 62 76 28 14 82 ~=618-19 
6 = 62 85 26 12 35 19 
s 5 60 86 26 15 36 9-22-21 
a: 20 56 70 28 11 30 17 
7 ms be 72 27 15 82 19-20 
51 79 28 14 34 18-17 
Specimens from Mahon are figured on Pls. XXIII. fig. 1 and XXVI. fig. 6. 
One of the types of Z. lilfordi from Ayre Island is represented on Pl. XXVL. fig. 7. 
The absence of any trace of a keel on the dorsal scales distinguishes this variety from 
the preceding as well as from the vars. serpa and tiliquerta. 
IV.—ITALY anp SICILY. 
A. Typical form, var. BREVICEPS Bler., var. BRUEGGEMANNI Bedr., 
and var. NIGRIVENTRIS Bonap. (Plates XXII., XXIII., XXIV., XXVIII.) 
In dealing with the variations of the Wall-Lizards in Central Europe, we have had 
no difficulty in satisfying ourselves that, however great the differences between 
individuals brought together under the name of L. muralis, we are not mixing up 
forms which, if better understood, might be regarded as distinct species or subspecies, 
and that even if any of the differences noticed should prove constant in a district, we 
are only uniting under one name local or geographical variations for the future 
recognition of which the name of the species coupled with the locality is amply 
sufficient. But as soon as we extend our investigations south of the Alps, the problem 
becomes more difficult, and we find ourselves confronted with several more or less 
distinct forms, which, as they sometimes occur side by side in a locality, it is imperative 
to distinguish by different names—be they called species, subspecies, races, or varieties. 
On the rank to be accorded to such forms, the opinions of the best herpetologists 
have differed very considerably in the past. 
In the last revision of these lizards! I have, following the lead of the highest 
authority on this difficult subject, grouped the Wall-Lizards of Italy under three 
headings: the forma typica (subsp. fusca Bedr.), var. brueggemanni Bedr. (on 
1 Cat. Liz. iii. p. 28 (1887). 
. 
