3. ANOIIS. 19 



* Head nearly twice as long as broad. 



Tlie adpressed hind limb reaches the ej-e .... 70. heliactin, p. 72. 

 The hind limb reaches the neck or the ear . . 71. ustus, p. 73. 



** Head about once and two thirds as long as broad. 



t Dorsal scales considerably smaller than ventrals, 

 two or four median rows abruptly enlarged. 



Two median dorsal rows enlarged : supra- 

 ocular scales keeled 73. concolor, p. 74. 



Two median dorsal rows enlarged ; supra- 

 oculars smooth 74. hourr/m, p. 74. 



Four median dorsal rows enlarged 7G. Iceviveatris, p. 76. 



ft Dorsal scales slightly smaller than ventrals, 

 graduating into the laterals. 



Enlarged supraocular scales much dilated 

 transversely, in a single longitudinal series, 

 smooth 77. nebulosus, p. 77. 



ttt Dorsal scales considerably smaller than ven- 

 trals, graduating into the laterals. 



Dorsal and ventral scales small ; male with- 

 out a large blue or purplish spot on the [p. 78. 

 gular appendage 80. intermedms, 



Ear-opeuing not or hardly half the length of 

 the occipital ; scales rather large ; male 

 with a large spot on the gular appendage . 81. scdJad, p. 79. 



Ear-opening measuring more than half the 

 length of the occipital ; male with a large 

 spot on the gular appendage 82. binotatus, p. 80. 



/3. Occipital not, or but slightly, longer than the ear- 

 opening, 



* Dorsal scales rhomboidal, keeled. 



Dorsal scales nearly as large as ventrals, 



small ; occipital not enlarged 75. salvhii, p. 75. 



Dorsal scales nearly as large as ventrals, 



large ; occipital enlarged 78. neJmloides, p. 77. 



Dorsal scales considerably smaller than ven- 

 trals, graduating into the laterals 83. cumingii, p. 80. 



Dorsal scales considerably smaller than ven- 

 trals, abruptly passing into the laterals. . 85. a-assulus, p. 81. 



c2 



