146. LTOo&jrATHirs. 57 



'which gradually decrease in size, followed, after an interspace, by 

 a pair of enlarged, grooved fangs situated below the posterior border 

 ■of the 'eye; anterior mandibular teeth strongly enlarged. Head 

 distinct from neck ; eye rather large, with vertically elliptic pupU. 

 Body compressed ; scales smooth, with apical pits, in 19 rows ; 

 ventrals strongly angulate laterally. TaU long ; subcaudals in two 

 rows. 



Tropical South America. 



1. Lycognatlms cervinus. 



Seba, Thes. i. pi. c. fig. 4 (1734), and ii. pi. xxxiz. figs. 1 & 2, & 



lixix. fig. 3 (1735). 

 Coronella cervina, Laur. Syn. Sept. p. 88 (1768). 

 Coluber cervinus, G7n£l. S. N. i. p. 1114 (1788). 



zeylonicus, part., Gmel. I. c. p. 1106. 



audax. Baud. Rept. vi. p. 345, pi. Ixxix. (1803). 



maximiliani, Men: Tent. p. 105 (1820). 



Dipsas audax, Fitdng. N. Class. Rept. p. 69 (1826). 



Lycodon audax, Boie, Isis, 1827, p. 525; Sckleg. Phys. Serp. ii. 



p. 121, pi. iv. figs. 18 & 19 (1837). 

 Lycognatnus scolopax, Dum. Sf Bibr, vii. p. 919 (1864). 



geminatus, Dum. ^ Bibr. t. c. p. 922. 



Oxyrhopus doliatua {nan D. Sf B.), Giinih. Cat. p. 192 (1858). 

 Siphlophis scolopax. Cope, Proc. Ac. Philad. 1861, p. 297. 

 Oxyrhopus scolopax, Jan, Elenco, p. 92 (1863), and Icon. G&n. 35, 



pi. iv. figs. 1 & 2 (1870). 



Rostral nearly twice as broad as deep, just visible from above ; 

 internasals much shorter than the prsefrontals ; frontal once and a half 

 AS long as broad, as long as its distance from the end of the snout, 

 shorter than the parietals ; loreal twice as long as deep ; one prae- 

 ocular, not reaching the frontal ; two or three postoeulars ; 

 temporals 24-3; eight (rarely nine) upper labials, third, fourth, 

 and fifth (rarely fourth and fifth or fifth and sixth) entering the 

 «ye ; four lower labials in contact with the anterior chin- 

 shields, v^hich are as long as or a little shorter than the posterior. 

 Scales in 19 rows. Ventrals 205-255 ; anal entire ; subcaudals 

 98-118. Yellowish above, variegated or irregularly spotted or 

 harred with black ; belly yellow, with black spots or irregular 

 «ross-hars. 



Total length 930 mUlim. ; tail 230. 



Brazil, Bolivia, Guianas, Trinidad. 



or-b. $ (V. 229, 234 ; Upper Amazon. Mr. E. Bartlett [0.1. 



C. 98, 103). 



e. $(V. 246 ; 0. 113). Larecaja, Bolivia. 



d. $(V. 238; 0.118). Yungaa, Bolivia. 



e. S , bad state (V. 242 ; Trinidad. H.M.S. ' Ohanticleer.' 

 0. 116). 



/. 2 (V. 238; 0. 106). -^? Oollege of Surgeons. 



w. 5 (V.255; 0.114). ? 



h. Skull. Bahia. 



