200 Lacertidm. 



Lacerta nmralis, var. tiliguerta, part., Bouleng. Cat. Liz. iii, p. 30 

 (1887). 



Lacerta muralis neapolitana, var. merremii, part., Werner, Eept. 

 Amph. Oesterr.-TJng. p. 43 (1897). 



Lacerta serpa,Ya,r. pelagosas, Werner, Verh. Zool.-bot. Gres. Wien, Hi, 

 1902, p. 384. 



Lacerta serpa, var. adriatica, Werner, t.c. p. 386. 



Lacerta muralis, var. serpa, part., Bouleng. Tr. Zool. Soc. xvii, 

 1905, p. 394, pi. xxiii, fig. 2, and pi. xxvii, figs. 3 and 4, and ix, 1913, 

 pp. 148, 180, pi. XX, figs. 6-9. 



Lacerta serpa, var. cazzse, Schrejb. op. cit. p. 454. 



? Lacerta serpa, var. argus, Schreib. op. cit. p. 455. 



In Southern Italy and in Dalmatia this form replaces the preceding, 

 more northern variety, with which it is so completely linked as to 

 Tender the naming of certain specimens arbitrary. 



It is, as a rule, a larger form, in some respects differing less from 

 the typical L. muralis. The occiput is usually flatter, the temporal 

 scales are smaller, more granular, the collar has the edge even, or, if 

 feebly serrated, less distinctly so, the subdigital lamellae are more 

 numerous on an average, the caudal scales are usually narrower, less 

 oblique, and more truncate posteriorly, their posterior border rarely 

 forming a well-marked angle, the scales on the body are smaller on an 

 average ; and finally, the rostral shield very rarely touches or enters 

 the nostril. 



Head 3^ to 4 times in length to vent in males, 4 to 4^ times in 

 females, 1^ to If times as long as broad, usually flat on the occiput, 

 its depth equal to the distance between the anterior corner or the 

 centre of the eye and the tympanum ; snout obtusely pointed, as long 

 as or a little longer than the postocular part of the head. Pileus 2 to 

 2^ times as long as broad. Body moderately depressed. The hind 

 limb reaches the shoulder, the collar, or between the collar and the 

 ear in males, the elbow or the axil in females ; foot once and one 

 sixth to once and a half the length of the head. Tail If to 2f length 

 of head and body. 



Rostral shield separated from the nostril, with rare exceptions* •- 

 nasals forming a suture behind the rostralf ; frontal as long as or 

 shorter than its distance from the end of the snout ; 6 superciliaries, 



* 3 males from Monte Gargano. 



t Except in a male from Rome. — 2 postnasals on right side in a male from 

 Pompeii, on both sides in a female and on left side in a male from the Faraglioni 

 Rocks and in a female from Pompeii. 



