Art. VI.] Herrick-T'erry-Kerrick, New Mejvtco Lt^ards. 121 
States, was said to occur in Texas as well as in the desert region 
of southern California and Arizona. It may therefore occur in 
New Mexico. Stejniger, however, denies that it occurs in either 
Texas or New Mexico. 
Genus. Holbrookia. 
Unlike the related genera, this genus is devoid of external 
ear discs, the tympanum being covered. The dorsal scales small, 
uniform ; head scales small, interparietal enlarged. A long 
series of femoral pores ; two transverse gular folds, the pos- 
terior with a denticulated edge ; no abdominal ribs ; males with 
enlarged postanal plates. The genus is limited to the south- 
western part of North America. 
Holbrookia Maculata, Girard. 
Plate XIV, Fig. /. 
Holbrookia maculata, Girard, Proc. Am. Assoc. Ad. Sci., 
1851; Stanbury’s Expedition Gt. Salt Lake ; Cope, Proc. U. 
S. Natl. Mus. 1880. 
var. flavilenta. Cope, Proc. Acad. Nat. Sci. Phil., 1883 ; 
Stejniger, N. A. Flora, No. 3 ; Boulenger, Cat. Liz. Btit. Mus. 
approximans, Baifd,Vroc. Acad. Nat. Sci. Phila. 
maculata approximans. Van Denhurgh, Cal. Acad. Sci., 
V, 1897. 
Description ; Body depressed fusiform, head short, V- 
shaped in perpendicular section ; nostrils on the upper surface ; 
head plates mostly small and irregular, except the interparietal, 
which is large, as wide as long ; one or more series of axial 
scales in front of the interparietal larger than the other head 
plates ; supraocular regions covered with small granules; super- 
ciliaries strongly imbricated ; middle subocular plate very large; 
eyelids well fringed ; about six upper labials, strongly imbri- 
cated ; lower labials smaller, not imbricate, separated from en- 
larged sublabials by a row of small scales ; gulars flat, not im- 
bricate, but becoming so on the last gular fold ; ventral scales 
larger than the dorsals and laterals, which are granular ; a lat- 
eral fold between the fore and hind limbs which are short ; 
