VARIETIES OF THE WALL-LIZARD. 147 



I have no hesitation in stating that there is not a single structural character, or 

 combination of characters, by which L. monticola can be distinguished from L. horvathi. 

 But, whereas the former is a mountain form probably derived from the var. hocagii, 

 with paired series of spots on the vertebral line, the latter should be regarded as 

 a mountain form derived from the typical L. muralis, with a single series of spots, 

 often confluent into a streak, on the vertebral line *. The difference between 

 L. monticola and L. horvathi is much less than that which separates L. sardoa from 

 L. hedriagce. 



III.— ITALY (Supplement), 

 Forma ttpica. 



I am indebted to Prof. O. Neumann for examples of this lizard, obtained by him in 

 beech woods at Bosco d' Umbra, Monte Gargano, N. Apulia, so far the southernmost 

 well-ascertained locality in Italy for the typical formf. 



Typical in scaling, but one of the specimens has five anterior upper labials on one 

 side. Dorsal scales feebly keeled. Pale brown above, with small blackish spots, 

 black with light spots on the sides ; bright red beneath, spotted with black. 



* I do not mean that the paired vertebral spots of var. monticola (see my pi. xxiv. fig. 2, Tr. 1905) 

 represent the vertebral series of spots or streak of the f. typica (1. c. figs. 3 & 4), or the paired vertebral spots 

 of some individuals of that form and of vars. canvpestris and set'joa (occipital band of Mehely). On the 

 contrary, these have totally disappeared in the var. bocagii, in some specimens of which (I. c. fig. 6) the series 

 of spots bordering the dorso-lateral light streak (Supraciliarstreifen of Mehely) have become approximated 

 in such a manner as to lead to the condition shown by the var. monticola, and correspond to the Parietalband 

 of Mehely. The series of Spanish and Portuguese specimens at my disposal show this most conclusively, 

 thus affording further proof of the derivation of the var. monticola from the var. bocagii, itself derived from the 

 f. tijpica. See diagram on p. 146 (fig. 3). 



t I have, however, since writing the above, seen specimens in the Florence Museum, labelled " Calabria 

 ultra," and which are certainly referable to the typical form. I have noted the following particulars of two 

 of those specimens : — 



1. 2. 3. 4. 5. 6. 7. 



cJ .... 60 54 25 9 24 17-16 25 



? .... 55 65 27 10 23 18 25 



As early as 1879 (Arch. f. Nat. p. 302) Bedriaga recorded this form from Arena, Calabria, on the authority 

 of Dr. Cavanna. 



