List of Half-tone Illustrations 



PLATE FACING PAGE 



xliii. STANSBURY'S SWIFT, Uta stansburiana . . . 125 

 WHITE-BELLIED SWIFT, Via symmetrica . . 125 

 CLARK'S SWIFT, Sceloporus clarkii . . .125 



xliv. COMMON SWIFT; FENCE LIZARD, Sceloporus undu- 

 latus. SPINY SWIFT; TEXAS SWIFT, Scelop- 

 orus spinosus . . ... 128 

 PACIFIC SWIFT, Sceloporus undulatus occidentalis ' . 128 

 BANDED SWIFT, Sceloporus undulatus consobrinus . 128 



xlv. WESTERN SWIFT, Sceloporus biseriatus . . .129 

 COLLARED SWIFT, Sceloporus torquatus poinsettii. 



The Finest Species of its Genus. . . .129 



xlvi. HEADS OF HORNED LIZARDS, Phrynosoma . . 144 



xlvii. DOUGLASS'S HORNED LIZARD, Phrynosoma doug- 



lassii ........ 145 



PAINTED HORNED LIZARD, P. douglassii orna- 



tissimum . 145 



HERNANDEZ'S HORNED LIZARD, P. douglassii 



bernandesi . . . . . . 145 



xlviii. DITMARS'S HORNED LIZARD, Pbrynosoma ditmarsii . 148 

 MEXICAN HORNED LIZARD, Phrynosoma orbiculare . 148 



xlix. REGAL HORNED LIZARD, Pbrynosoma regale . . 149 

 PACIFIC HORNED LIZARD, Phrynosoma coronatum . 149 



1. TEXAS HORNED LIZARD, Pbrynosoma cornutum. 

 Commonest and Most Widely Distributed of 

 the Horned Lizards. . . .156 



ASHY HORNED LIZARD, Pbrynosoma calidiarum . 1 56 



li. KEELED LIZARD, Gerrbonoius multicarinatus . 157 



LONG-TAILED EXAMPLE OF THE KEELED LIZARD, 



Gerrbonoius multicarinatus 1 57 



lii. BROWN LIZARD, Gerrbonotus liocepbalus . . 160 



KING'S LIZARD, Gerrbonotus kingii. The Most 



Brightly Coloured Member of its Genus. . 160 



liii. PLATED LIZARD, Gerrhonotus imbricaius . . .161 

 GLASS "SNAKE," Opbisaurus veniralis . . 16 



xxvi 



