270 C0LUBRIDJ5. 



a. cT (V. IGo ; C. 62). Madagascar. (Type.) 



b. 2 ('V. 166; 0.69). Madagascar. 



e. cJ (V. 170; 0.56). Imerina. Rev. -R. Baron fO.]. 



d. Ho-r. (V. 162 ; 0. 54). S.E. Betsileo. Mr. T. Waters [0.]. 



13. PSEUDOXENODON. 



Xenodon, part., Hoie, Isis, 1827, p. 540 ; Sehleff. Phys. Serp. ii. p. 80 

 (1837) ; Giinth. Cat. Col. Sn. p. 53 (1858) ; Jan, Arch. Zoul. Anat. 

 Phys. ii. 1863, p. 316. 



Xenodon, Wagl. Syst. Amph. p. 171 (18:iO). 



Tropidonotus, part., Oiinth. Sept. Brit. Ind. p. 258 (1864). 



Pseudoxeuodon, Bouleny. Faun, hid., Rept. p. 340 (1890). 



Maxillary teeth. 20 to 28, increasing in size posteriorly, the two 

 last abruptly enlarged and separated from tlie others by an inter- 

 space; mandibular teeth subequiil. Head distinct from neck, which 

 is dilatable ; eye large, with round pupil. Body cylindrical ; scales 

 on the anterior part of the body disposed obliquely, narrow and 

 much imbricate, in 17 or 19 rows ; dorsals keeled ; no apical pits : 

 ventrals rounded. Tail moderate ; subcaudals in two rows. Hypa- 

 pophyses developed throughout the vertebral column. 



East Indies and Southern China. 



Synopsis of the Species. 



One praeooular ; scales in 19 rows ante- 

 riorly ; ventrals 158-173 ; subcaudals 

 55-75 1. macrops, p. 270. 



One prasocular ; scales in 17 rows aiite- 



riorly ; ventrals 140 ; subcaudals 51 . 2. dorsalis, p. 271. 



Two or three prasoculars ; scales in 1 9 rows ; 



ventrals 118-121 ; subcaudals 36-41 . . 3. inornatus, p. 272. 



1. Pseudoxenodon macrops. 



Tropidonotus macrops, Blyth, Journ. As. Soc. Beny. xxiii. 1855, 



p. 296 ; Gimth. Kept. Brit. Ind. p. 2(i3 (1864) ; Stoliczka, Journ. 



As. Soc. Beny. xl. 1871, p. 436; Theob. Cat. Bept. Brit. Ind. 



p. 174 (1876). 

 • angusticeps, part., Blyth, I. c. p. 205 ; W. L. Sclater, Journ. 



As. Soc. Bern/. Ix. 1891, p. 240. 

 Xenodon macroplithalmiis. port., Oiinth. Cat. p. 58 (1858). 

 Tropidonotus macropbthalinus, part., Giinth. Rept. Brit. Ind. p. 262, 



pi. xxii. fig. 0. 



macrophthalmus, Anders. Proc. Zool. Soc. 1871, p. 77. 



sikkimensis, Anders. Jmrn. As. Soc. Beiiy. xl. 1871, p. 17. 



Pseudoxenodon macrops, Bouleny. Faun. Ind., Bept. p. 340 (1890). 



Rostral just visible from above; intemasals shorter thnn the 

 prasfrontals ; frontal once and one fourth to once and one third as 

 long as broad, as long as or slightly shorter than its distance from 

 the end of the snout, shorter than the parietals ; loreal as loug as 



