246 MR. G. A. BOULEXGER ON [June 6, 



thi-ee ; loreal rows five ; six upper labials to below the centie of 

 the eye ; ear-opening rather small, vertically oval. Gular appendage 

 very large, extending far back on the breast, in the male, absent 

 in the female ; gular scales feebly keeled. Body feebly compressed ; 

 no dorso- nuchal fold. Dorsal scales subrhomboidal, subimbricate, 

 strongly keeled, passing gradually into the minute, granular 

 scales of the sides ; ventrals much larger than doi'sals, lounded, 

 imbricate, smooth. The adpressed hind limb reaches the eye 

 or a litte beyond ; digits moderately dilated ; 1 6 lamellee under 

 phalanges II and III of the fourth toe. Tail scarcely compressed, 

 twice as long as head and body. Male with enlarged postanal 

 scales. Reddish brown above, with a paler broad vertebral 

 stripe, widening on the nape ; this stripe edged with dark brown 

 in the female ; lower parts golden, the gular appendage bright red. 



Total length 1 50 millim. Fore limb 23 millim. 



Head 16 ., Hind limb ... 37 ,, 



Width of head .. . 10 „ Tail 100 „ 



Body 34 „ 



Two specimens, male and female, from Omilteme, Guerrero, 

 7600 ft. 



The male is remarkable in the absence of the inner digit on the 

 four limbs. 



Allied to A. nebulosus Wiegm. Distinguished j^rincipally by 

 the smooth ventral scales. 



SCELOPORGS GADOVI.E. (Plate YII. fig. 1.) 



Head-shields smooth ; frontal transversely divided, separated 

 from the interparietal by a pair of frontoparietals ; interparietal 

 as long as broad ; parietals small, one pair on each side ; two canthal 

 scales ; five or six large transverse supraoculars, bordered inwards 

 by one series of scales, outwards by one or two ; five long pointed 

 scales form a strong denticulation in front of the ear. Dorsal 

 scales larger than ventrals, strongly keeled, pointed or shortly 

 mucronate, forming oblique series converging towards the median 

 line, passing gradually into the smaller scales of the sides ; 73 to 

 77 scales between the interparietal shield and the base of the tail ; 

 19 or 20 scales, taken in the middle of the back, correspond to the 

 length of the shielded part of the head. Ventral scales small, 

 smooth, bicuspid. 75 to 80 scales round the middle of the body. 

 The adpressed hind limb reaches the ear ; tibia as long as the 

 distance between the end of the snout and the ear ; 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 postei'ior 

 border of the ear. 28 to 33 femoral pores on each side, the two 

 series narrowly separated on the prseanal region. Tail comj^ressed ; 

 caudal scales a little larger than dorsals, strongly keeled, the two 

 median upjDer series more strongly mucronate and forming a paii- 

 of serrated ridges. Male with slightly enlarged postanal scales. 

 Greyish olive above, reddish on the sides, dotted with bluish 



