A7. HOLBROOKIA. 209 
3. Holbrookia elegans. 
Holbrookia elegans, Bocourt, Miss. Sc. Mex., Rept. p. 164, pl. xvii. 
bis. fig. 8. 
Supraccular scales subequal ; occipital as long as broad. Dorsal 
scales keeled. Tibia longer than the distance between the end of 
the snout and the gular fold. Greyish above, with four longitudinal 
series of angular brown spots on each side of the vertebral line; 
those of the upper series largest and white-edged ; a blackish streak 
along the hind side of the thighs; lower surfaces yellowish, no 
lateral or caudal spots. 
Mazatlan. 
4, Holbrookia maculata. 
Holbrookia maculata, Girard, Proc. Am. Assoc. Adv. Sc. iv. 1851, 
p. 201, and in Stansbury’s Exped. Gr, Salt Lake, p. 342, pl. iv. 
figs, 1-3; dA. Dum. Arch, Mus. viii. p. 546; Bocourt, Miss, Se. 
Mezx., Rept. p. 161, pl. xvii. bis. fig. 7; Cope, Bull. US. Nat. Mus. 
no. 17, 1880, p. 15. 
—— approximans, Baird, Proc. Ac. Philad. 1858, p. 253; Bocourt, 
le. p. 163. 
Head relatively a little larger than in H. tevana; upper head- 
scales more convex ; occipital as long as broad, or a little broader 
than long ; upper labials very narrow and very oblique, five or six. 
Dorsal scales not quite so small, granular or subhexagonal, smooth 
or feebly keeled. Edge of the gular fold strongly denticulated. 
Limbs shorter ; the adpressed hind limb does not reach the eye; 
foot measuring one half to two thirds the distance between axilla 
and groin. Eleven to fifteen femoral pores on each side. Male 
with enlarged postanal scales. Tail subcylindrical, shorter than 
head and body. Grey above, vertebral region frequently lighter, 
with a series of large darker spots on each side; sometimes with 
scattered whitish dots ; one or two black spots on each side of the 
belly. 
millim. millim. 
Total length ...... 104 Fore limb........ 24 
Head: 2.x crs avec 12 Hind limb........ 39 
Width of head .... 11 Pail, oss nae ve oe 49 
Body iss saa vies 43 
Southern United States; North Mexico. 
a-b. 9. Cherokees, Tennessee. 
c-d. 2. Kansas. 
ef. S92. N. Texas. E. D. Cope, Esq. [E.}. 
g-h,t. SQ. Mexico. 
5. Holbrookia lacerata. 
Holbrookia lacerata, Cope, Bull. U.S. Nat. Mus. no. 17, 1880, p. 15. 
Allied to H. maculata. Tail cylindrical, a little longer than the 
VOL. II. P 
