7 \. DBOMICU8. 110 



slightly di-itinct from neck; eye moderate or rather large, with 

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

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

 Tail long; subcaudals in two rowa. 

 : Indies, Chili and Peru. 



Synopsis of the Specits. 



I. Subcaudals 100 or more. 



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



rows 1. c'tamissonis, 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. anyulifer, p. 120. 



Loreal absent 3. ater, p. 121. 



Loreal present, pentagonal 4. sancUv-crucis, p. 122. 



2. Scales in 19 rows. 



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



Ventrals 191-210 6. leucomelfis, p. li': ;. 



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 2 L rows. 



8. anomalug, p. 125. 



II. Subcaudals 80-83 ; scales in 19 rows. 9. exiguus, p. 126. 



1. Dromicus chauiissonis. 



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



1835, p. 240, pi. xix. 

 Psammophis temminckii, Schleg. Phys. Serj). ii. p. 218, pi. viii. 



figs. 14 & 15 (1837) j Quicken, in Gay, Hist. Chile, Zool. ii. p. 84 



(1848). 

 Dromicus temminckii, Dum. ST Bibr. vii. p. 603 (1854) ; Gilnth. 



Cat. p. 131 (1858); Girard, U.S. Explor. Exped., Herp. p. Kil 



(1858). 

 T.i-niophis tantillus, Girard, Proc. Ac. Philad. 1854, p. 1?:?7, ntvl in 



<;iHi*, U.S. Nao. Astr. Exped. ii. p. i'1'i, pi. xxxvii. figs. 7-12 



(1855). 



l>etodryas biserialis, Giinfh. Proc. Zool. Soc. 1800, p. 97. 

 Liophis teraminckii, Cope, Proc. Ac. Pkilatl. 1802, p. 70, and Journ. 



Ac. Philad. (-2) viii. ls?, p. 181. 

 Dromicus chamissonis, Steind. Novara, Rept. p. 65 (1867); Peter*, 



.!///. ttrrl. Ac. 1809, p. 719; Gunth. Z<>1. Rer. IrtOO.p. I l.'i. 

 chaminsonis, vars. dorsalis ft habeli, Steind. Festtchr. zool.- 



bot. Gt. Jl'ien, 1870, p. 300, pi. i. 



