O94 MR. G. A. BOULENGER ON THE VARIETIES OF 
Var. SERPA. 
Lacerta serpa Rafinesque, Caratt. ale. n. Gen. Anim. p. 8 (1810). 
Lacerta sicula Rafin. 1. ce. 
Lacerta olivacea Ratin. |. c. 
Lacerta puccina Rafin. 1. ¢. 
Podarcis muralis albiventris et siculus Bonap. Icon. Faun. Ital., Anf. (1836) . 
Lacerta muralis cerulea Eimer, Verh. phys.-med. Ges. Wiirzb. iil. 1872, Sitzb. p. 1x, and Zool. 
Stud. Capri, ii. p. 5, pl. i. (1874). 
Lacerta muralis neapolitana Bedriaga, Enst. d. Farb. b. d. Eidechs. p. 15 (1874). 
Lacerta faraglionensis Bedriaga, op. cit. p. 16, pl.—., and Die Faraglione-Kidechse (1876). 
Lacerta muralis, vars. striata, elegans, modesta, maculata Eimer, Zool. Stud. Capri, i. p. 24, pl. il, 
Lacerta muralis, vay. viridiocellata Bedriaga, Arch. f. Nat. 1877, p. 113. 
Lacerta muralis neapolitana, part., Bedriaga, Arch. f. Nat. 1878, p. 285, Bull. Soc. Zool. France, 
1879, p. 202, Arch. f. Nat. 1879, p. 274, and Abh. Senck. Ges. xiv. 1886, p. 204. 
Lacerta muralis, vars. faraglionensis, latastii, viridiocellata Bedriaga, Bull. Soc. Zool. France, 1879, 
pp- 207, 209, 211, pl. ix. fig. 4. 
Podarcis muralis, vars. albiventris, sicula, doderleini, maculata, viridiocellata, faraglionensis De Betta, 
Atti Ist. Ven. (5) v. 1879, pp. 3889-393. 
Lacerta muralis maculato-striata, jpunctato-striata, punctato-fasciata, striato-maculata, maculata, 
reticulata (part.), modesta, concolor, elegans, ceruleo-ceerulescens, coerulescens monaconensis, 
cerulescens gallensis Kimer, Arch. f. Nat. 1881, pp. 375-389, pls, xii.—xv. 
Lacerta serpa, part., Camerano, Mon. Saur, Ital. p. 56 (1885). 
Near Rome the var. serpa occurs in addition to the vars. nigriventris and campestris, 
but further south the var. campestris is replaced by this very closely related form, 
which reaches a larger size, and which in many respects differs little from the typical 
L. muralis, especially if compared with the southern var. nigriventris. As in the 
latter, the head is generally more flattened, resembling less that of JL. viridis, the 
temporal scales are smaller, more granular, the collar has the edge even, or, if serrated, 
less distinctly so than in var. campestris, the difference in size between the vertebral 
scales and the dorso-laterals is less marked, the subdigital lamelle are usually fewer, 
and the caudal scales are more truncate posteriorly, their posterior border rarely forming 
a well-marked angle. But it is distinguished from the typical form and its vars. 
brueggemanni and nigriventris by generally smaller scales, more numerous femoral 
pores, and longer toes with more numerous lamelle under the fourth. 
The complete passage between Z. muralis typica and the var. serpa, so far as scaling 
is concerned, is well expressed by the following tabulation ! :— 
1, Zs 3. 4, 5. 
Forma typica See RRO 29-45 19-30 13-25 22-28 
Var. brueggemanni . . . 51-65 385-52 22-30 17-24: 24-27 
War.migriventris. ~. (5 1. Oo-71 37-51 22-29 18-23 27-381 
Var. serpa . 35-60 25-35 19-29 28-36 
58-77 
1 1. Number of scales across middle of body. 2. Number of transverse series of scales corresponding to 
the length of the head. 3. Number of scales along middle line of gular region, 4. Number of femoral 
pores. 5. Number of lamellar scales under fourth toe. 
