392 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
lengths, separated from each other by red spaces of nearly equal size ; 
all except anterior 4 or 5 red interspaces with most of the scales spotted 
(black-tipped or bases black) ; first black band (nape) covering about 
8 scale lengths; yellow nuchal collar covering three scale lengths mid- 
dorsally, laterally extending only to posterior portion of seventh 
supralabials; remainder of sides and top of head black. 
Description of holotype.—Rostral broader than high; length of por- 
tion visible from above three-fourths length of internasal suture; inter- 
nasal two-fifths size of prefrontals, quadrangular; prefrontals ex- 
tending well onto sides of head, the greatest extension a point between 
loreal and preocular; frontal pentagonal, the lateral and posterolateral 
sides meeting in a broad curve; length of frontal (5 mm.) slightly 
less than its distance from tip of snout (5.5 mm.) nearly as great as 
greatest length of parietal (6 mm.) ; nasal large, completely divided, 
naris large and centrally placed, anterior section larger than posterior 
and wedged between first labial and rostral; loreal twice as long as 
broad; preocular single, nearly as large as supraocular, in contact 
with frontal and with one (two) labials, much narrower below than 
above; two postoculars, lower smaller; temporals 2-2 (2-3), the sixth 
labial narrowly in contact with upper primary temporal; eight supra- 
labials, sixth and seventh subequal and larger than others, fourth and 
fifth (third also, narrowly, on one side) entering orbit; eye small, 
its diameter (2.8 mm.) about half its distance from tip of snout (5.8 
mm.) ; ten infralabials, sixth largest, five in contact with anterior chin- 
shields; latter a little larger than posterior, which are narrowly sepa- 
rated from each other. 
Dorsal scales in 19-19-17 rows, smooth, with 2 large apical pits; 
ventrals 191; anal single; caudals 89. Total length 700 mm., tail 173 
mm. 
Maxilla with 15 teeth, the 2 posterior somewhat enlarged, and with 
a deep groove on anterior face; other teeth ungrooved; the anterior 
ones strongly recurved and a little larger than posterior teeth (of 
ungrooved series). 
Color —Top and sides of head uniform black, this color extending 
laterally to posterior border of seventh supralabial, medially a little 
beyond end of parietals; this bordered by a yellow nuchal collar with 
a straight posterior border, covering about 3 scale lengths medially ; 
follows a series of 23 crossbands on body, 13 on tail; bands shorter 
on posterior part of body than on anterior, all a little shorter laterally 
than medially; first band covering about 8 scale lengths, others 6 to 
31% scale lengths, decreasing posteriorly; these bands involving ends 
of ventrals; red spaces between black bands nearly equal size of lat- 
ter; anterior red space without black (a few tiny flecks) ; succeeding 
3 species with numerous, small flecks; succeeding 2 with the tip of 
