1906,] m MEXICAN LIZARDS. 333 



field 3-3 is bordered by black bands enclosing a grey centre, which 

 is more or less clearly subdivided by a darker central line, so that 

 in all 7 or 8 pale stripes can be counted. In the oldest male the 

 first stripe is broken up into a row of bluish spots owing to the 

 black of the boi'dering fields joining across the stripe ; an arrange- 

 ment which leads on the sides of the thorax to the formation of 

 imperfect black, short cross-bars. In this respect this old male 

 agrees with the old male from Lerdo, q. v. 



Two specim-'MS from La Cruz, collected by Dr. Meek (63 and 

 76 mm.). 



Frenoculars present in one, absent in the other specimen. 

 Collar composed of large scales, in the younger with granules 

 on the sides of the edge. 



Humerus with 6 rows, the fifth continuous aci^oss the elbow 

 with the main long row of much enlarged scutes of the forearm. 



Femoral rows 5, all unusually large, three of which continued 

 to the knee. 



Tibia with 3 rows of scutes, and in the larger specimen with a 

 small fourth row. 



Pores 15/16 and 17/18. 



Colour of under parts : Collar and throat flesh-colour to pink, 

 sides of collar slightly mottled. Chest, abdomen down to the last 

 ventrals and anus blue-black ; the same colour, bnt somewhat 

 mottled on the thighs. Behind the thigh a white stripe. 



Upper parts : 3 pairs of bluish- white stripes and rather faint 

 pale spots in the almost black fields. Mid-field 3-3 bordered by 

 black bands enclosing a fourth pair of grey stripes, which are 

 separated by a ventral streak, or row of black specks, indicating 

 in all 8 stripes. 



Three sjiecimens from San Jioan, collected by Dr. Meek (57, 

 58, and 59 mm.). 



Frenoculars present in all. 

 Collar composed of larger scales. 

 Humerus with 6 rows. 



Forearm with enlarged scutes, none of which reaches beyond the 

 proximal half of the arm. 



Femur with 5, 6, and 7 rows. 



Tibia with 3 rows and a small 4th on the fibular side. 

 Pores 16 in all specimens. 



Throat pink, collar yellowish or mottled on the sides. Chest 

 and abdomen black, gradually changing to flesh-colour towards 

 the groins, which is also the colour of the preanal region of the 

 whole under surface of the hind limbs, tail, humerus, and fore- 

 arm. 



Upper parts very dark, the fields I., II., and III. being nearly 

 black, with only one row of faint pale spots in the fii'st two fields. 

 On the back are 8 pale bluish stripes, the third and fourth pairs 

 being dull grey and the latter pair divided by a black central line. 

 There is no doubt that the 13 specimens from Montemorelos, 

 Garza Yaldez, La Cruz, and San Juan are closely allied to each 



