1906.] IN MEXICAN LIZARDS. 371 



the typical G. tessellatus from Cedros Island, restricts the supposed 

 differences of his C. multiscutatus to a mere individual variation. 



Further, a specimen (text-fig. 64 A) obtained by Dr. Meek at 

 El Paso fits exactly the C tessellatus multisciitatus. Length 

 93 mm. Humerus with 7 to 8 scales ; femur with 7 ; pores 22/20. 

 The throat and collai- are pale blue, both with scattered jet-black 

 spots. Chest white, with scattered black spots. Belly white to 

 greenish yellow, here and there with half a black scale. Thighs 

 below greenish yellow ; tail below with blackish spots. Dorsal 

 surface of black ground-colour with 4 pairs of light stripes, of 

 which the first is broken up into yellow sj)ots and bars, while the 

 others are partly broken and zigzag. On the shoulders and neck 

 the general colour is grey with about six rows of black spots, 

 while the last tiuces of the former pale stripes are completely 

 lost. Thighs above and behind with large greenish-yellow spots 

 on bluish gi-ound. 



As a peculiarity I mention in this specimen the existence of 

 three enlarged scales across the lower eyelid, exactly as those 

 figured by Cope, p. 584, in tessellatics imhidus. The artist no 

 doubt saw coi-rectly, but the author does not mention this peculiar 

 arrangement. 



Cnemidophorus maximus Cope. 



From Lower California : Cape St. Lucas, La Paz, and the little 

 island of Espirito Santo. " The largest species of the genus " ; 

 Boulenger returns the largest as of 120 mm. 



Humeral rows 4-5 in Cope's key, p. 568, but in the text, 

 p. 571, are stated 6-8. Anterior surface of forearm with 4 rows ; 

 posterior sui'face granular, but according to the figure with 

 slightly enlarged granules on mid-arm. Femur with 7 rows; but 

 in the figure I should certainly count 9. Pores 24-25 ; in the 

 figure only 21 or 22. The young are said to have a median light 

 stripe and two paired stripes on blackish ground. Each of the 

 fields with two rows of pale spots. The adult are olive-brown 

 with three brown stripes on each side as broad as the fields, "and 

 so broken by spots of the ground-colour as to resemble series of 

 confluent brown variations." " Gular region blackish varied ; 

 abdominal shields black- tipped." 



Apparently these specimens from the southern part of Lower 

 California constitute a large, coai-sely marbled, and luther dull- 

 coloured race of C. tessellatus. 



Cnemidophorus rubidus Cope. 



From S. Margarita Island, West Coast of Lower California. 

 Length 100 mm. Humeral rows 5-6 ; femoral rows 8-9. Pores 

 22. 



The young have traces of six stripes on light brown ground, and 

 the fields are cross-barred with olive and black, as in the adult of 

 C gularis inariarum. 



Proc. Zool. Soc— 1906, Vol. I. No. XXV. 25 



