71. LErxorHis. 107 



Scales all except the outer row strongly 



keeled 11. liocercus, p. 113. 



B. Scales in 15 rows, smooth ; ventrals not angulate laterally. 



12. ortoiili, p. 114. 



C. Scales in 13 rows, aU except the outer row keeled. 



13. urostictus, p. 114. 



1. LeptopMs aeruginosus. 



Leptophis feruginosus, Cope, Journ. Ac. Philad. (2) viii. 1876, 

 p. 132; Gimth. Biol. C.-Atn., RepL p. 130 (1894). 



Philothainnus aerugiuosus, Cupe, Proc. Amer. Philos. Sac. xxiii. 

 1886, p. 279. 



Nasal not elongate ; loreal present, subquadrate ; prseocular 

 scarcely reaching frontal; two postoculars ; temporals 1 4- 2 ; nine 

 upper labials, fifth and sixth entering the eye ; posterior chin-shields 

 longer than the anterior. Scales in 15 rows, not keeled, but finely 

 striate. Ventrals faintly angulate laterally, 146; anal divided; 

 subcaudals 142. Golden brown above ; vertebral line (one row of 

 scales) yellow on the anterior half of the body ; a black streak on 

 each side of the head behind the eye ; beneath blue, fading to 

 yellowish on the gular region. 



Total length 405 miUim. ; tail 155. 



Costa Eica. 



2. Leptophis depressirostris. 



Philothamnus depressirostris, Cope, Proc. Ac. Philad. 1860, p. .557. 

 Leptophis depressirostris, Giinth. Biol. C.-Am., Pept. p. 130 (1894). 



Rostral twice as broad as deep ; frontal as long as the parietals ; 

 nasals elongate : loreal present, thrice as long as deep ; one prae- 

 and two postoculars ; nine upper labials, fifth and sixth entering 

 the eye. Scales smooth, in 15 rows. Above uniform deep green ; 

 an inconspicuous temporal streak; a very delicate black line 

 traverses the centre of each of the two rows of scales that bound 

 the vertebral row : upper lip and lower parts light green. 



Total length 650 millim. 



Cocuyas de Veraguas, Colombia. 



3. LeptopMs modestus. 



AhsetuUa modesta, Giinth. Ann. Sf Mag. N. H. (4) ix. 1872, p. 26, 



pi. vi. fig. C. 

 riiilothamuus modestus, Cope, Proc. Amer. Philos. Sac. xxiii. 1886, 



p. 279. 

 Leptopliis modestus, Giinth. Biol. C.-Am., Eept. p. 129, pi. xlviii. 



(1894). 



Eye a little shorter than its distance from the nostril. Rostral 

 broader than deep, just visible from above; internasals shorter than 



