66 _ LACERTILIA. 
Size of an apparently adult female 24 inches without tail. 
Originally described from two specimens taken on the western slope of the Volcan 
de Atitlan, at an elevation of 610 metres. 
5. Sceloporus torquatus. 
Sceloporus torquatus, Wiegm.* Isis, 1828, p. 869; and Herpet. Mex. p. 49, t. 7. fig. 1; Bocourt, 
Miss. Sc. Mex., Rept. p. 171, t. 18. figg. 9, 9a-c; Cope, Proc. Am. Phil. Soc. 1885, p. 401 ; 
Boul. Cat. Liz. ii. p. 219; Dugés, La Naturaleza, i. p. 113 (1878). 
Agama torquata, Green & Peale, Journ. Ac. N. Sc. Phil. vi. 1880, p. 231. 
Tropidolepis torquatus, Gray, in Beechey’s Voy., Zool. p. 95, t. 30. fig. 2. 
Hab. Mexico, Highlands, Misteca, and Hacienda del Bobo (Geddes), Temascaltepec 
(Keating), city of Mexico, Jalisco, north of the Rio Santiago (fichardson). 
From twenty-two to twenty-four scales along the back. The large supraoculars not 
divided. Hind limb equal to the distance of the vent from the humeral joint ; fourth 
toe as long as the head. Femoral pores 15-20. Scales on the neck conspicuously 
smaller than those on the back. A broad black collar, edged with yellow (white, 
greenish), across the neck. Lower parts of the adult male blue, blackish in the middle 
in old individuals, with more or less yellowish in younger ones. Back sometimes with 
brownish markings or irregular yellow spots. 
Size of an adult male 43 inches without tail. 
6. Sceloporus omiltemanus, sp.n. (Tab. XXXII. fig. A.) 
Hab. Mexico, Omilteme in the State of Guerrero 8000 feet (7. H. Sintth). 
Twenty-three or twenty-four scales in a series along the back; scales on the back 
smooth or faintly keeled, with a short terminal spine and a few fine denticulations ; 
scales on the neck smaller than those on the back. The large supraoculars divided 
into a double series. Hind limb equal to the distance of the vent from the collar; 
fourth toe a little longer than the head. Femoral pores twelve or thirteen. Green or 
dark-bronze-coloured, with a broad black collar edged with light green across the neck ; 
some scales of the upper arm red or green. Adult male blue underneath, the middle 
of the abdomen being blackish anteriorly and whitish posteriorly. ‘Tail not banded. 
Adult female with the throat blue, and with the abdomen uniform greenish. | 
Size of adult male 3? inches without tail. 
In very young specimens the black white-edged collar is already quite distinct, but 
the scales on the back are strongly keeled and without lateral denticulations. 
To this fine race of the torquatus-group none of the various specific or varietal 
names are applicable, and as its locality can be stated with sufficient exactness, and 
does not seem to have been visited by other collectors, I think it best to describe this 
lizard under a distinct name. 
* Wiegmann has priority in giving this name to the species, Green and Peale having selected the same 
specific term two years later, independently and in ignorance of Wiegmann’s paper in the ‘ Isis.’ 
