190 
PROCEEDINGS OF THE NATIONAL MUSEUM. 
VOL. XXIV. 
PSEUDOBOA ROBINSONI, new species. 
Fig. 25.— Pseudoboa kobin 
SONI, X Ij. 
DtiK/iKms. — Scales in l!» rows; ventrals, 186; anal single; subcaudals, 
82, sinolo; posterior nasal and loreal widely separated by second labial 
which is ))i-oadly in contact with prefrontal; rostral prominent, slightly 
upturned, broader than deep, the portion visible 
from above one-half as long as its distance from 
the frontal; supralabials eight. 
Type.—C^d.. No. 22532 U.S.N.M.; La Guaira, 
Venezuela; June 21, 1895; Capt. Wirt Robinson, 
collector. 
Ilahitat. — Venezuela. 
Description of type specimen. — Eye rather small; snout projecting; 
rostral large, prominent, slightly upturned, broader than deep, its 
upper portion forming an obtuse angle and measuring one-half 
its distance from the frontal; internasals slightly 
shorter than prefrontals; frontal much longer than 
broad, equally its distance from tip of snout and 
longer than interparietal suture; parietals as long as 
frontal and one-half the interpref rental suture; loreal 
small, much longer than deep, broadly separated from 
posterior nasal; one preocular scarcely reaching the 
upper surface and widely separated from frontal; two 
postoculars; 2 + 3 temporals, the upper one of the first 
row only in contact Avith postoculars; eight supralabials, 
second broadly in contact with prefrontal and sixth in 
contact with upper anterior temporal, fourth and fifth entering eye; 
four lower labials in contact with anterior chin-shields, which are 
slightly longer than the posterior; scales smooth, in 19 rows, with two 
terminal pits; ventrals, 186; anal single; subcaudals, 
82, single; color (in alcohol), above, uniform drab, be- 
coming paler on the three lower scale rows; top of 
head and a spot on upper neck behind occiput darker; 
underside, including upper labials, uniform whitish. 
Total length, 700 mm; tail, 175 mm. 
Remarks. — Pseiidohoa rohinsoni in some respects 
occupies an intermediate position between P. neunnedii 
and P. guerini., having a snout more projecting than 
the former, but less so than the latter, though the 
portion of the rostral visible from above is not greater 
than in P. neuwiedii. It dift'ers from both most strikingly in the 
separation of the loreal from the posterior nasal, the second super- 
labial thus coming broadly in contact with the prefrontal. 
Fig. 26.— Pseudo- 
boa ROHINSONI, 
Fig. 27.— Pseudo- 
boa ROBINSONI, 
X n. 
