SYNOPSES AND DESCRIPTIONS. 105 
Black rings not in groups; 
first broad ring behind the oeciput black fulvius. 
first broad ring behind the occiput red euryxanthus. 
black rings in threes; 
occipital band red; a yellow band in front of the eyes; middle 
band of group wider decoratus. 
occipital band black; 
black bands subequal, narrow; 13—14 groups elegans. 
occipital band yellow; 
middle band of each group much wider; 7—8 groups 
laticollaris. 
Exaps FuLvius, pl. VIII, fig. 3. 
Cotuser Frutvius Linné, 1766, Syst. Nat., ed. XIT, p. 381. 
Exars runvius Cuvier, 1817, Regn. Anim., ed. I, p. 84. 
Slender, cylindrical; head little broader than the neck, depressed, rounded ; 
tail short, thick, conical, near one seventh of the total. Mouth-cleft medium, 
nearly straight. Head-shields nine, short, broad. Rostral low, broad, sub- 
triangular. Nasal in two parts, nostril between, anterior larger. Orbitals 
1+2, exceptionally one postorbital. Labials 7 (6—8), third and fourth in 
orbit, fifth, sixth, and seventh larger. Infralabials 7, fourth large, in contact 
with the posterior pair of submentals. Scales smooth, broad, in 15 rows, 
outer broader.  Ventrals 202—236 (tenere, B. et G., 224—236). Anal 
divided, sometimes entire. Subeaudals 25—44 pairs. Head and_ tail 
ringed with black and yellow, body with black, red, and yellow. Head 
black, with a yellow ring crossing the occipitals, its width equal to their 
length, widening downward. Body encircled by 15—20 rings of each of 
the black and the red, in some of the varieties the number is greater. The 
yellow are twice as many and serve as borders to the black, in some cases 
they are nearly obsolete. All the rings vary much in width, commonly the 
yellow ones are very narrow, and with the included red one, occupy about as 
much space as one of the black; frequently the black is the narrower. The 
red is generally spotted or dotted with black; specimens from Alabama and 
Florida show in the midst of the red band an oblong spot on each side of 
the vertebral line and a large rounded spot on the middle of the belly. 
Largest specimen two feet in total length; tail three inches. Hab. South- 
ern United States to Mexico, and southward through varieties. 
