74. DROMICUS. 119 



slisjhfcly distinct from neck ; eye moderate or rather lar^e, with 

 round pupil. Body cylindrical ; scales smooth, with apical pits, 

 in 17 to 23 rows; ventrals not or but obtusely angulate laterally. 

 Tail long ; subeaudals in two rows. 

 West Indies, Chili and Peru. 



Sijiiojjsis of the /S^je.'us. 



I. Subeaudals 100 or more. 



A. Fourth and fifth upper labials entering the eye ; scales in 19 



rows 1. c'lamissonis, p. 119. 



B. Third, fourth, and fifth upper labials entering the eye ; 



anterior chin-shields shorter than the posterior. 



1. Scales in 17 rows. 



Loreal present, tetragonal 2. anjulifer, p. 120. 



Loreal absent 3. ater, p. 121. 



Loreal present, pentagonal 4. scuicke-cracls, p. 122. 



2. Scales in 19 rovA's. 



Ventrals 172-189 5. antillensis, p. 123. 



Ventrals 191-210 , 6. leucomelas, p. 123. 



3. Scales in 21 or 23 rows 7. rtifiventris, 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. Subeaudals 80-83 ; scales in 19 rows. 9. exlguus, p. 126. 



1. Dromicus chamissonis. 



Coronella cliamissonis, Wiegm. N. Acta Ac. Leop.-Carol. xvii. i. 



1835, p. 24(3, pi. xix. 

 Psammophis temminckii, Schleg. Phi/s. Serp. ii. p. 218, pi. viii. 



tigs. 14 & 15 (1837) ; Guichen. in Gay, Hist. Chile, Zool. ii. p. 84 



(1848). 

 Dromicus temmincldi, Dum. 8f Bibr. vii. p. 663 (1854) ; Giinth. 



Cat. p. 131 (1858J ; Gimrd, U.S. Explor. Exped., Herp. p. 161 



(1858)_. 

 T;i5nii)phis tantillus, Girard, Proc. Ac. Philad. 1854, p. 227, and in 



Gillie, U.S. Nao. Astr. Exped. ii. p. 21-5, pi. xxxvii. figs. 7-12 



(1855). 

 Ilerpetodryas biserialis, Giinth. Proc. Zool. Sac. 1860, p. 97. 

 Liophis temminckii, Cope, Proc. Ac. Philad. 1862, p. 76, and Journ. 



Ac. Philad. (2) viii. 1876, p. 181. 

 Dromicus chamissoois, Steind. Novara, Rept. p. 65 (1867); Peter.<f, 



Man. Berl. Ac. 1869, p. 719; Giinth. Zool. Rec. 1869. p. 115. 

 • chamissonis, vars. dorsalis et habeli, Stei?id. Festschr. zool.- 



bot. Ges. Wien, 1876, p. 306, pi. i. 



