148. DIPSABOMORPHTTS. 59 



Eudipsas leucocephalus, Giintk. Cat. p. 168 (1868). 

 Oxyrhopus leucocephalus, Jan, Menco, p. 02 (1863), and loon. Gin, 

 35, pt iii. fig. 3 (1870). 



Eostral broader than deep, just visible from above ; internasals 

 much shorter than the praefrontals ; frontal a little longer than 

 broad, as long as its distance from the end of the snout, a little 

 shorter than the parietals ; loreal longer than deep ; one praeocular, 

 in contact with or narrowly separated from the frontal ; two post- 

 ooulars; temporals 2+3; eight upper labials, fourth and fifth 

 entering the eye ; four lower labials in contact with the anterior 

 chin-shields, which are as long as or a little longer than the posterior. 

 Scales in 19 rows. Ventrals 228-2.58 ; anal entire ; subcaudals 

 110-125. Yellowish or pale brown above, with dark brown cross- 

 bars, which may be broken in the middle and alternate ; head 

 white ; neck blackish brown ; uniform whitish beneath. 



Total length 1080 millim. ; tail 250. 



Guianas, Brazil, Bolivia. 



a. S (V. 228 ; 0. 116). Barbice. 



b. Yg. (V. 248 ; 0. 112). Berbice. Lady Essex fP. l- 

 o-d. S (V.245; C. 124) & hgr. Demerara FaUs. 



(V. 248; C. 110). 



e. S (V. 247 ; 0. 125). Para. 



f. 2 (V. 258; C. 118). Brazil. Lord Stuart rP.l. 



g. 6 <V. 237 ; 0. ?). Brazil. 



148, DIPSADOMORPHUS. 



Hurria, part., Daud. Sept. v. p. 275 (1803). 



Boiga, part., Fitzing. N. Class. Mept. p. 29 (1826). 



Dipaas, part., Boie, Isis, 1827, p. 548 ; Schleg. Phys. Serp. ii. p. 257 



(1837) ; Gunth. Cat. Col. 8n. p. 169 (1858) ; Jan, Elenco sist. Ofid. 



p. 103 (1863) ; Gunth. Mept. Brit. Ind. p. 307 (1864). 

 Dipsadomorphus, J^torey. in Tsohudi, Faun. Per., Herp. p. 55 (1845), 

 Opetiodon, Dtim. 8^ Bibi-. Mem. Ac. 8c. xxiii. 1853, p. 494, and Frp. 



Gen. vii. p. 905 (1854). 

 Triglyphodon, Bum. §• Bibr. U. cc. pp. 507, 1069. 

 Toxicodiyas, Sallow. Proc. Ac. Philad. 1857, p. 60. 

 Dipsadomorphus, part., Giinth. Cat. p. 174. 

 Boiga, Cope, Proc. Ac. Philad. 1860, p. 264. 

 Pappophia, MacUay, Proc. Linn. Soc. N. 8. W. ii. 1877, p. 39. 

 Dipsas, Bouleng. Faun. Ind., Mept. p. 357 (1890). 

 LiophaUus, Cope, Proc. Ac. Philad. 1894, p. 427 (1895). 



MaxiUary teeth 10 to 14, subequal in size, followed by two or 

 three enlarged, grooved fangs ; anterior jnaudibular teeth longest. 

 Head very distinct from neck ; eye moderate or large, with 

 vertically elliptic pupil ; posterior nasal more or less deeply concave. 

 Body, more or less compressed; scales smooth, more or less oblique, 

 with apical pits, in 17 to 31 rows, the vertebral row more or less 

 enlarged ; ventrals obtusely angulate laterally. Tail moderate or 

 long ; subcaudals in two rows. 



Tropical Africa, Southern Asia, Papuasia, Australia. 



