510 



MK. G. A. BOULEN6ER ON THE 



[May 18, 



nearly as long as the shielded part of the head ; the distance 

 between the base of the fifth toe and the extremity of the fourth 

 exceeds the distance between the end of the snout and the pos- 

 terior border of the ear. 14—22 femoral pores on each side. 



Caudal scales much larger than dorsals, strongly keeled, shortly 

 mucronate. Males with enlarged postanal scales. 



1. 



3. 



6. 



8. 



Mexico 



", Sail^ ' 



i> ' 



Ciudad, Durango. Forrer. 



Ventanas, Durango. Forrer. 

 Guanajuato. Duges 



67 

 58 

 64 

 54 

 57 

 55 

 51 

 51 

 49 

 49 

 50 

 46 



13 

 11 

 12 

 11 

 11 

 11 

 11 

 11 



14 

 12 

 14 

 12 

 12 

 12 

 12 

 12 



14 

 12 



18 

 16 



14 ! 17 



11 i 15 



12 j 15 

 11 14 



10 11 

 10 11 



10 11 



9 ! 10 



11 I 12 



12 

 12 

 11 

 11 

 10 



14 

 14 

 14 

 14 

 13 



10 12 



11 14 



Jalapa. Hoege 

 Orizaba 



Puebla. Boucard 



City of Mexico. Duges 



Omilteme, Guerrero (1). Smith .J 



„ (1). „ 

 Popocatepetl, 9000 ft. Godman . 



J) *j )) 

 S.Mexico. Godman 



63 



48 



46 



59 



66 



70 i 



62 ! 



43 I 



66 



65 ; 



62 ' 



60 1 



GO 



49 



43 



63 



55 



50 



11 

 13 

 11 

 10 

 12 

 11 

 13 

 12 

 10 

 13 



12 

 14 

 12 

 11 

 13 

 12 

 15 

 13 

 11 

 14 



11 

 13 



14 

 17 



11 I 15 



10 ! 13 



12 i 15 



11 I 15 



13 I 17 

 13 15 



71 

 78 

 68 

 63 

 83 

 72 

 80 

 71 

 70 

 77 

 74 

 67 

 64 

 68 

 82 

 75 

 72 

 73 

 82 



16 

 16 

 15 



78 

 70 

 62 



15 62 



16 I 72 

 16 71 

 18 i 70 

 16 66 

 16 72 



13 ; 14 

 12 13 



13 

 12 

 11 

 10 

 13 

 11 

 10 



14 

 14 

 12 

 11 

 14 

 12 

 11 



10 

 14 

 14 

 12 



13 

 18 

 17 

 16 



13 i 16 

 13 16 



10 

 9 

 14 

 11 

 10 



14 

 13 

 17 

 14 

 14 



74 

 66 

 67 

 65 

 68 

 78 

 70 

 74 

 74 

 72 

 72 

 72 

 82 I 20 i 73 

 73 1 16 I 74 



17 

 16 

 18 

 16 

 15 

 20 

 20 

 20 

 18 

 21 



83 i 16 

 79 1 16 



82 

 78 

 60 

 62 

 72 

 63 

 72 

 80 

 82 



20 

 17 



74 

 72 



12 I 64 



15 62 



16 i 62 

 70 



r9 



18 

 18 

 19 

 19 



I. 



66 



68 



18-18 



17-15 



16-16 



16-15 



15-15 



17-17 



16-15 



15-15 



14-14 



16-16 



14-15 



1.5-16 



16-15 



16-16 



17-17 



16-15 



17-18 



16-16 



14-14 I 



18-191 



17-18 



18-18 



17-18 



17-18 



17-16 



15-16 



17-18 



16-16 



16-15 



17-16 



16-15 



16-17 



(1) Types of S. ruhriventris. 



Brownish, olive, or green above, the sides often marbled with 

 black ; dorsal region immaculate, or irregularly spotted with black 

 and whitish, more often with a double series of angularly curved 

 black markings pointing forwards ; head frequently with transverse 

 black lines ; usually a large black spot in front of the shoulder, 

 sometimes connected with its fellow across the throat. Males 

 with the throat and the sides of the belly blue, broadly edged 

 with black near the narrow whitish median ventral line ; front of 

 thighs sometimes black.^ Females yellowish or greenish below, 



1 Some males, according to Duges, have the middle of the throat, and the 

 flanks above the blue patches, orange. 



