74, DROMICUS. 119 
slightly distinct from neck; eye moderate or rather large, with 
round pupil. Body cylindrical; scales smooth, with apical pits, 
in 17 to 23 rows; ventrals not or but obtusely angulate laterally, 
Tail long; subcaudals in two rows. 
West Indies, Chili and Peru. 
Synopsis of the Specics. 
I. Subcaudals 100 or more. 
A. Fourth and fifth upper labials entering the eye; scales in 19 
OWS bo p52 ieee we ole NN Dace cnansliors 1. chamissonis, p. 119. 
B. Third, fourth, and fifth upper labials entering the eye ; 
anterior chin-shields shorter than the posterior. 
1. Seales in 17 rows. 
Loreal present, tetragonal ........... . 2. angulifer, p. 120. ' 
aren aS qemekern ficke sw) <i2ic 2 Paces « 3. ater, p. 121. 
Loreal present, pentagonal ......... . 4, sanctee-crucis, p. 122. 
2. Scales in 19 rows. 
Ventrals 172-189 ....... Oa Cee 5. antillensis, p. 123. 
Mem eS CN — LSet cave sree ak oleues' » 6. leucomelas, p. 123. 
3. Scales in 21 or 23 rows ..... . 7. rufiventris, p. 124. 
C. Fourth labial entering the eye; posterior chin-shields no 
longer than the anterior; scales in 21 rows. 
8. anomalus, p. 125. 
II. Subcaudals 80-83; scalesin 19 rows. 9. exiguus, p. 126. 
oO: % 5 
1. Dromicus chamissonis. 
Coronella chamissonis, Wiegm. N. Acta Ac. Leop.-Carol. xvii. i. 
1835, p. 246, pl. xix. 
Psammophis temminckii, Schleg. Phys. Serp. ii. p. 218, pl. viii. 
figs. 14 & 15 (1837) ; Guichen. in Gay, Hist. Chile, Zool. 11. p. 84 
1848). 
estas temminckii, Dum. §& Bibr. vii. p. 663 (1854) ; Giinth. 
Cat. p. 181 (1858); Girard, U.S. Explor. Exped., Herp. p. 161 
(1858). 
Treniophis tantillus, Girard, Proc. Ac. Philad. 1854, p. 227, and in 
Gills, U.S. Nav. Astr. Exped. ii. p. 215, pl. xxxvii. figs. 7-12 
(1855). 
Herpetodryas biserialis, Giinth. Proce. Zool. Soc. 1860, p. 97. 
Liophis temminckii, Cope, Proc. Ac. Philad, 1862, p. 76, and Journ. 
Ac. Philad. (2) viii. 1876, p. 181. 
Dromicus chamissonis, Steind. Novara, Rept. p. 65°(1867); Peters, 
Mon. Berl. Ac. 1869, p. 719; Giinth, Zool. Rec. 1869, p. 115. 
—— chamissonis, vars. dorsalis e¢ habeli, Stend. Festschr, zool.- 
bot. Ges. Wien, 1876, p. 306, pl. i. 
ty 
