80. APOROPHIS. ay) 
N. Am. Rept. p. 77, pl. vi. fig. 6 (1883); H. Garm, Bull. Iltin. 
Lab. iii. 1892, p. 305. 
Heterodon simus kennerlyi, Cowes § Yarrow, 1. ¢. p. 271. 
Maxillary teeth 6 to 8+2. Rostral as broad as the distance 
between the eyes; several small shields separating the internasals 
and the prefrontals; frontal as broad as long or broader, shorter 
than its distance from the end of the snout, as long as or longer 
than the parietals ; eye surrounded by 10 or 11 shields in addition 
to the supraocular ; eight upper labials; one pair of chin-shields, in 
contact with three or four lower labials. Scales all, except the 
outer row, strongly keeled, in 23 rows. Ventrals 126-150; anal 
divided ; subcaudals 32-45. Pale brown or yellowish above, with 
three alternating series of brown spots, the median largest and 
usually broadest ; a dark cross band between the eye, a broad oblique 
band from the eye to the mouth, and three elongate blotches behind 
the head; belly yellowish white, with deep black blotches, or 
entirely black in the middle. 
Total length 600 millim. ; tail 70. 
United States, west of the Mississippi, North Mexico. 
a. ¢ (V. 148; C. 36). Kansas. Smithsonian Instit. [ P. |}. 
b-c, d. 2 (V. 138, 188, Duval Co., Texas. W. Taylor, Esq. [C.]. 
141; C. 35, 38, 38). 
en Yer (V. 126; ©.37). | Texas. Smithsonian Instit. [ P.]. 
(As typical of H. kennerly?.) 
he OF (Vlas Cr32). Texas. (One of the types of H. catesbyi.) 
80. APOROPHIS. 
Herpetodryas, part., Schleg. Phys. Serp. ii. p. 173 (1837). 
Dromicus, part., Dum. § Bibr, Erp. Gén. vii. p. 646 (1854) ; Giinth. 
Cat. Col. Sn. p. 126 (1858) ; Jan, Elenco sist. Ofid. p. 66 (1863). 
Lygophis (non Tsch.), part., Cope, Proc. Ac. Philad. 1862, p. 75. 
Aporophis, part., Cope, Proc. Am. Philos. Soc. xvii. 1877, p. 34. 
Maxillary teeth 18 to 22, followed after an interspace by two 
enlarged onés; mandibular teeth subequal. Head narrow, slightly 
distinct from neck ; eye large, with round pupil. Body cylindrical ; 
slender; scales smooth, without apical pits, in 17 or 19 rows. 
yentrals rounded. ‘Tail rather long; subcaudals in two rows. 
South America. 
Synopsis of the Species. 
Scales in 19 rows; ventrals 165-178 .. 1. lineatus, p. 158. 
Scales in 17 rows; ventrals 157-178; 
frontal as long as the parietals...... 2. flavifrenatus, p. 158. 
Scales in 17 rows; ventrals 155; 
frontal a little shorter than the 
PAeICEA yas tastier slate wea es oislatt 3. coralliventris, p. 159. 
Scales in 17 rows; ventrals 137-143; 
frontal as long as the parietals...... 4. amenus, p. 160. 
