FICIMIA. 99 
The rostral shield forms a suture with the vertical; a small pair of anterior frontals 
in front of the large posterior. One anterior and two posterior oculars; loreal con- 
fluent with the posterior frontal. Seven upper labials, the third and fourth entering 
the orbit. Ventrals 140-146. In a young specimen, from 6 to 8 inches long, the 
ground-colour is whitish, the back being ornamented with from thirty-six to thirty- 
eight dark brown cross-bars, which on the sides break up into spots. The upper 
part of the head is symmetrically marked with brown spots, the hindmost of which. 
occupies the end of the occipital shields, but remains widely separate from the foremost 
nuchal band. 
3. Ficimia cana. 
Gyalopion canum, Cope, Proc. Ac. N. Se. Phil. 1861, p. 243. 
Gyalopium canum, Yarrow, in Wheeler’s Report Geogr. & Geol. Explor. v. p. 624, t. 18. figg. 2, 2a 
(bad) (1875). 
Ficimia cana, Garman, Mem. Mus. Comp. Zool. viii. no. 3, p. 83 (1883). 
Hab. Norrn America, Arizona (Cope), El Paso in Texas (Forrer). 
The rostral shield does not reach the vertical; two pairs of frontals, the anterior of 
which are small. One anterior and two posterior oculars; loreal confluent with the 
posterior frontal. Seven upper labials, the third and fourth entering the orbit; ven- 
trals 133. In a young specimen, about 8 inches long, the ground-colour is very light, 
and the back crossed by forty-five brown cross-bands, which on the sides break up into 
spots; nine of these bands belong to the tail. The foremost band occupies the neck, 
and slightly encroaches upon the occipitals; upper side of the head with indistinct 
symmetrical transverse markings. 
Found on the Mexican frontier. 
4. Ficimia quadrangularis, sp.n. (Tab. XXXV. fig. A.) 
Hab. Mexico, Presidio de Mazatlan in Sinaloa (Forrer). 
The rostral shield does not reach the vertical; two pairs of frontals, the anterior of 
which are very small; vertical nearly as broad as long, occipitals not much longer. 
Seven upper labials, of which the hindmost is very small, scale-like, the third and fourth 
entering the orbit ; one anterior and two posterior oculars; temporals 1+2. One pair 
of chin-shields. Scales in seventeen rows; ventrals 129; subcaudals 25. Ground- 
colour nearly white, each scale with a narrow blackish margin. Along the back runs 
a row of large subquadrangular black spots; there are twenty-six on the trunk and 
five on the tail. Only the two anterior extend downwards on the side of the neck ; 
they are also broader than the others, and the foremost is continued forward over the 
occipitals and the interorbital space, leaving the temple and the snout almost white. 
One specimen 12 inches long, of which the tail takes 13 inch. 
*13 2 
