250 Illinois State Laboratorij of Natural History. 



SCELOPORUS, WiEG. 



Wiegmann, Isis, 1828, p. 369. 



Holbrook, N. A. Herp., 1842, II., p. 73. 



Hoffmann, Bronn's Thier-Reich, 1883, VI., Reptilien, p. 1238. 



Body somewhat depressed. Head shorh, convex above; 

 plates mostly small. Interparietal largest. Nostril near the 

 margin of the snout, opening in a single plate. Several series 

 of supraeiliaries. No subgular fold. A short fold on each 

 side of the neck. Scales imbricated, those of the back and 

 tail cariuated, those of the belly smooth. Tail rather short, 

 depressed and thickened at the base. Femoral pores well de- 

 veloped. No anal pores. 



Sceloporus undulatus, Bosc. Brown Swift, Pine-tree 

 Lizard. 



tStellio undulatus, Bosc, Latreille's Nat. Hist. Rept., 1801, II., p. 



40. 

 Lacerta hyacinthina {$) and L.fasciata (?), Green, Jour. Acad. 



Nat. Sci. Phila., 1818, p. 349. 

 Ayama nndjilata, Harlan, Med. and Phys. Res., 1853, p. 140. 

 Tropidolepis unduJata, Dum. et Bibr. Erp. Gen.. IV., 1837, p. 298. 



—Holbrook, N. A. Herp., 1842, II., p. 73, pi. 9.— De Kay, Nat. 



Hist. N. Y., I., Zo()l. III., Rept. and Amph., 1842, p. 31, pi. 



8, fig. 16.— Gray, Cat. Spec. Lizards in Coll. Brit. Mus., 1845, 



p. 208. 

 Sceloporus undulatus, subsp. undulatus, Davis and Rice, Bull. 



111. State Lab. Nat. Hist., I., No. 5, 1883, p. 48; Bull. Chicago 



Acad. Sci., 1883. 



Total length about six and a half inches. Scales large 

 above, sharply carinate and mucronate, many of them with 

 notches on each side of the apex, about forty-five in a row from 

 the parietals to a point opposite the vent. Scales below not 

 carinate nor mucronate but with an apical notch. Scales in a 

 transverse row midway between the fore and hind legs, about 

 forty-five. Femoral pores from twelve to sixteen. Two 

 frontal plates. Five series of supraeiliaries, one of large plates, 

 and an inner one and three outer series of small obtusely cari- 

 nate ones. From two to four small frontoparietals. Four 

 small parietals and a single very large interparietal. From 



