730 ME. G. A. BOULENGEE ON ADDITIONS TO THE IIZAED [DeC. 4, 



millim. millim. 



Total length 231 194 



Head 26 22 



Width of head 22 18 



Body 70 69 



Fore limb 42 38 



Hind limb 64 55 



Tail 135 103 (reproduced) 



This species appears to be nearest allied to 'S'. dugcsii, Bocoiirt. 

 Several specimens were obtained in the State of Jalisco, at Colonia 

 Brizuela and at La Cumbre de los Arrastrados, 8500 feet altitude, 

 by Dr. A. C. Buller. 



Among the Eeptiles brought home by Dr. Buller from the 

 Isthmus of Tehuautepec there are specimens which I refer to 

 S. melanorhinus, Bocourt. As that species is still very imperfectly 

 known, and as the specimens I have referred to it differ in a 

 few points from Boeourt's diagnosis, I append the following 

 description : — 



ScELOPQRTTS MELANORHINUS, Bocourt, Joum. de Zool. V. 1876, 

 p. 401. 



Head large ; snout much flattened. Head-shields smooth ; a 

 series of four large transverse supraoculars, separated from the 

 frontal and from the supraciliaries by one series of small scales, the 

 fourth in contact with the parietal ; occipital (interparietal) a Httle 

 broader than long, as broad as or broader than the parietals, which 

 are large and broader than long ; ear-opening nearly hidden under 

 the large pointed scales in front of it. Dorsal scales much larger 

 than ventrals, as broad as long, strongly keeled and mucronate, 

 entire or feebly denticulate, forming parallel longitudinal series ; 

 26 or 27 scales between the occipilal scale and the base of the tail ; 

 6 or 7 scales correspond to the length of the shielded part of the 

 head ; lateral scales keeled, directed upwards and backwards, 

 graduating into the dorsals and ventrals ; latter smooth, bicuspid ; 

 36 to 40 scales round the middle of the body. The adpressed 

 hind hmb reaches the shoulder or the ear; tibia a little shorter 

 than the shielded part of the head ; the distance between the base 

 of the fifth toe and the extremity of the fourth equals the distance 

 between the end of the snout or the nostril and the ear. 19 or 20 

 femoral pores on each side. Caudal scales nearly as large as 

 dorsals. Male with enlarged postanal scales. Yellowish or 

 greyish olive above; a yellowish, black-edged cross-bar between 

 the eyes ; a yellowish band from behind the eye to above the 

 axilla, between \Ahich a blackish blotch or bar extends across the 

 scapular region ; some less distinct dark cross-bars may follow on 

 the back ; male with the lower surface of the head black and 

 white in front, pale blue behind, yellowish green on the sides ; 

 the breast and median line of belly salmon-red ; the belly pale 

 blue near the median line, yellowish green on the sides, 



