390 ME. G. A. BOULENGEE ON THE VAEIETIES OE 



have mixed with the var. campestris and formed together the assemblage which we 

 now designate as var. serpa. This explanation may account for certain reappearances 

 of the characters of the typical form in Southern Italy, Sicily, and Malta, which have 

 so greatly perplexed the best observers. The Sicilian specimens which have been 

 distinguished as var. sicula have retained much of the general habits and coloration of 

 the var. campestris, but the lepidosis is quite the same as in the var. serpa. 



Var. CAMPESTRIS. 



Podarcis muralis, var. campestris De Betta, Atti Ace. Verona, xxxv. 1857, p. 152 ; Faun, d'ltal., 

 Rett. Anf. p. 28 (1874); Atti 1st. Venet. (5) iv. 1878, p. 897, and v. 1879, p. 388. 



Lacerta tiliguerta De Filippi, N. Ann. Sc. Nat. Bologna, (3) v. 1852, p. 69. 



Lacerta muralis neapolitana, vars. campestris and livomensis Bedriaga, Arch. f. Nat. 1879, pp. 274 

 & 279, and Abh. Senck. Ges. xix. 1886, pp. 209 & 223. 



Lacerta muralis, var. campestris Leydig, Deutschl. Saur. p. 228 (1872) ; Eimer, Zool. Stud. Capri, 

 ii. p. 25, pi. ii. fig. 3. 



Lacerta muralis striata, part., Eimer, op. cit. p. 25. 



Lacerta muralis striata campestris Eimer, Arch. f. Nat. 1881, p. 328, pi. i. figs. 1 & 2. 



Lacerta serpa, part., Camerano, Mon. Saur. Ital. p. 56 (1885). 



Lacerta muralis, var. multifasciata Positano Spada, Boll. Soc. Rom. Zool. i. 1892, p. 154, fig. 



Head (PL XXVIII. figs. 2 & 2 a) once and a half to once and two-thirds as long as 

 broad, moderately depressed, its depth in the tympanic region equal to the distance 

 between the anterior border or the centre of the eye and the anterior border of the 

 tympanum ; snout obtuse. 



Neck as broad as or a little narrower than the head. Body moderately depressed. 

 Hind limb reaching the shoulder, the collar, or a little beyond the collar in males, the 

 axil or the elbow of the adpressed fore limb in females ; foot once and one-sixth to 

 once and one-third the length of the head. Tail cyclo-tetragonal at the base, once and 

 two-thirds to twice as long as head and body. 



Rostral shield narrowly separated from the nostril, or entering it l ; nasals always 

 forming a suture behind the rostral ; frontal usually as long as its distance from the 

 end of the snout, sometimes considerably shorter; a series of granules between the 

 supraciliaries and the two principal supraoculars, the first of which is usually in contact 

 with the first supraciliary, rarely with the second also ; in a few specimens 2 the series 

 of granules beginning from the first supraocular ; parietals once and one-third to 

 once and a half as long as broad, usually in contact with the upper postocular, but 

 sometimes not 3 ; occipital very variable, usually shorter but often broader than the 



1 This I observe in several specimens from Turin, in one from Florence, in two from Castelfranco, near 

 Eome. 



5 One from Yenice, one from Bologna, one from Lake Trasimene, Perugia. 



3 In four specimens from Turin, in two (out of four) from Lake Trasimene, in five (out of six) from 

 Castelfranco, near Eome. 



