CUOCODILIANS, LIZARDS, AND SNAKKS 



middle of the abdomen. Femur spotted with blue below; tibia and 

 tail light-greenish below. 



Measurements. — Total length, 127 mm.; length to vent, 57 mm.; length 

 to line of axilla, 22 mm.; length to line of interparietal plate, 13 mm.; 

 length of hind leg, 38 mm. ; length of hind foot, 18 mm.; length of fore 

 leg, 23 mm.; length, of fore foot, 10 mm. 



Sceloporus vandenburgianus Cope. 



I have seen of this species only one specimen, which is an adult male. 

 The colors of the female may be expected to be somewhat lighter. I 

 have dedicated it to Mr. John Vau Denburgh, of San Francisco, au 

 able writer on herpetological subjects. 



SCELOPORUS iEHEUS Wiegmann. 



Sceloporus aneus Wikgmann, Isis, 1828, p. 370; Herpet. ifex., 1834, p. 50. — 

 FiTZiNGEU, Syst. Rept., 1843, p. 75.— Bocoukt, Miss. Sc. Mes., 1874, p. 205, 

 pL xviii bis, tig. 4, 4a, 4b.— Coi-E, Proc. Aiuer. Pliil. Soc, XXII, 1885, p. 394. 



Tropidolcpis ivneus Dumkuii, and IUbrox, Erp. Gen., IV, 1837, p. 309. — Gkay, 

 Cat. Liz. Brit. Mus., 1845, p. 210. — Aug. Dum<'':ril, Cat. Metli. Mas. Hist. Nat. 

 Paris, 1851, p. 78. 



A small species with an arched profile. Supracephalic plates keeled, 

 arranged as in S. scalaris, each canlhus rostralis having two roof- 

 shaped scutes; supraocular scales subhexagoual, in three rows, those 

 of the internal row scarcely wider than long. The two froutals creased 

 with a furrow; the i)osterior, nearly as large as the anterior, is articu- 

 lated behind, along the shorter side, with the occipital i)late. The 

 latter, as wide as it is long, narrow in front, is bordered right and left 

 by one or two frontoparietals and one parietal scute; behind, its outline 

 is subround, showing in the middle a hollow in which is inclosed a small 

 nuchal scale, a little larger than those on the upper part of the neck. 

 Labial scales rectangular, eight above and ten below ; above the upper 

 ones there are two longitudinal series of lengthened scales. Anterior 

 border of the ear bordered with scutella smaller than those which pre- 

 cede them. Dorsal scales not notched, rhomboidal, strongly keeled, 

 sharply pointed, forming thirty-eight oblique series, from the nape of 

 the neck to the posterior borderof the thighs, eight longitudinal to the 

 level of the shoulders, and twelve in the trunk region; eight of these 

 scales equal the length of the top of the head; ventral scales and 

 those of the sides rather small, the latter feebly notched, forming by the 

 Junction of their keels longitudinal lines parallel to those on the upper 

 surface of the body. Tail scales smaller than those on the body, except 



