36 SYNOPSES AND DESCRIPTIONS. 
Hyprors apacurvs, pl. I, fig. 5. 
CoxusBer Apacurus Holbrook, 1836, N. A. Herp. 1st ed., I, 119, pl. XXII, 
Hyprors asacurus Dum. & Bibr., 1854, Erp. Gén., Tab, 65. 
Long, moderately stout, cylindrical; head very little larger than the 
neck, depressed, rounded; tail short, thick, conical, one sixth to one ninth 
of the total. Snout short, broad. Eye medium, over third and fourth 
labials, pupil round. Mouth-cleft deep, slightly curved. Teeth little 
larger backward. Head-shields eight. Internasals united. Prefrontals 
reaching the orbit. Frontal hexangular. Nasal entire, grooved from the 
nostril to the first labial. Nostril small, visible from above. Loreal 
united with anteorbital. One anteorbital. Postorbitals two, lower small, 
in a notch between the labials. Temporals 1+2. Labials seven, some- 
times fused or divided, penultimate larger. Infralabials nine, fifth larger. 
Submentals two pairs, hinder small. Scales smooth, glossy, rounded at 
the end, in 19 rows, outer broader. Ventrals large, broad, 171—203. 
Anal bifid. Subcaudals in 3547 pairs. 
Ground color red, yellow in alcohol. Back and usually top of head 
bluish-black. The black color extends down the flanks in wedge-shaped 
points, separated by wedges of the red, which sometimes extend to the 
middle of the back. The bands of black extend nearly or quite to the 
middle of the belly, where they meet or alternate with those from the 
opposite side. Red occasionally encircling the neck or scattered over 
the top of the head. Anterior labials and chin-shields, with rounded 
spots of black. Largest specimen 54 inches long; tail 52 inches. Mis- 
sissippi Valley and eastward, as far north as Illinois and Virginia. 
HYDROPS QUINQUEVITTATUS. 
Homatorsis quinquevirratus Dum. & Bibr., 1854, Erp. Gén. VII, 975. 
Elongate, moderately stout, subcylindrical; head distinct, little larger 
than the neck, depressed, crown flat, muzzle narrow between the nostrils; 
tail stout, tapering regularly to the point. Eye moderate, pupil round. 
Mouth-cleft deep, outline curved. Posterior maxillary teeth longer, sepa- 
rated by an interspace. Head-shields normal. Internasals small, narrow 
infront. Frontal short, broad, truncate, or angled in front. Nasal divided 
orentire. Loreal half as large as the anteorbital. Postorbitals two. Tem- 
porals 1+2, Submentals two pairs, nearly equal, posterior diverging. 
