LACERTA MURALIS IN WESTERN EUROPE AND NORTH AERICA. 391 



interparietal ; temporal scales usually larger than in the typical L. mnralis, with the 

 tympanic shield always distinct and the masseteric frequently so, the latter separated 

 from the parietal by a narrow supratemporal or by one to three series of scales ; nearly 

 constantly four upper labials anterior to the subocular 1 . 



Collar-edge more or less distinctly serrated (PI. XXVIII. fig. 2 b), sometimes as 

 much as in L. viridis; 8 to 11 plates in the collar; gular fold very distinct ; 21 to 32 

 scales and granules between the symphysis of the chin-shields and the median collar-plate. 



Scales on the back roundish-hexagonal or oval-hexagonal, very distinctly, often 

 sharply, keeled ; the vertebral line usually with a more or less regular band of much 

 smaller granular scales (PL XXVIII. fig. 2 c) ; lower lateral scales as large as or a 

 little smaller than the dorso-laterals, smooth or faintly keeled ; 53 to 65 scales (usually 

 57 to 61) across the middle of the body; three or four transverse series of scales 

 correspond to one ventral plate, 33 to 50 to the length of the head. Ventral plates 

 in 6 longitudinal 2 and 23 to 31 transverse series. Anal plate smaller than usual in 

 L. mnralis typica, usually with two or three semicircles of small plates, but sometimes 

 with one only. 



Text-fig. 5. 



«■ A. c. 



Anal region of Lacerta muralis, var. campestris. 



a. S , Turin, o. £ , Turin, c. d , Ancona. 



Scales on upper surface of tibia smaller than the dorsals, more or less strongly 

 keeled; 24 to 30 (usually 25 to 29) lamellar scales under the fourth toe; 15 to 24 

 (usually 17 to 22) femoral pores on each side. 



Upper caudal scales (PI. XXVIII. fig. 2 c) strongly keeled and obtusely but distinctly 

 pointed behind; 30 to 40 scales in the fourth whorl behind the postanal granules. 



Typical examples of this race, as represented by specimens from Verona, Venice, 

 Treviso, and Turin (PL XXVII. figs. 1 & 2), have the upper surface of the head, a 

 vertebral band, the sides of the body, the limbs, and the upper surface of the tail pale 

 brown or olive-brown, the sides of the back bright grass-green; the brown vertebral 

 band bears two parallel series of small black spots, or a single straight or zigzag series 

 of large black spots ; these spots, as a rule, do not begin until some way behind the 

 occiput or nape ; the sides, in females, bear two more or less distinct, straight or 

 wavy, whitish streaks (the upper proceeding from the supraciliary border, the lower 

 passing through the car), which may be edged with black or bordered by small black 



1 Five on one side iu one specimen from Lake Trasimene, three on eaeli side in one from Ancona. 

 ■ The outer ventral plates are divided into two in a female specimen from Lake Trasimene. 



vol. xvil. — I'AKT iv. No. 6. — October, 1905, 3f 



