298 COLTJBKIDJE. 



Synopsis of Indian, Ceylonese, and Burmese Species. 



Scales in 13 rows ; one or two praeoculars H. nympha, p. 298. 



Scales in lo rows ; one prreocnlar H. gracilis, p. 298. 



Scales in 13 rows ; no praeocular H. daiisonii, p. 299. 



357. Hydrophobus nympha. 



Russell, Ind. Scrp. i, pis. xxxvi, xxxvii. 



Coluber nympha, Baud. Kept, vi, p. 244, pi. Ixxv, fig. 1. 



Lycodon nympba, Soie, Isis, 1827, p. 522. 



Odontomus nympha, Dtnn. $ Bibr. Erp. Gen. vii, p. 450 ; Giinth. 



Rept. B. I. p. 233 ; Jan, Icon. Onhid. 38, pi. v, fig. 2 : Theob. Cat. 



p. 160. 

 Hydrophobus semifasciatus, Giinth. A. M. N. H. (3) ix, 1862, p. 127, 



pi. ix, fig. 6. 



Odontomus semifasciatus, Giinth. Rept. B. I. p. 234 ; Theob. I. c. 

 Odontomus nympha, var. ceylonensis, F. Mull. Verh. nat. Ges. Basel, 



viii, 1887, p. 269. 



Kostral not twice as broad as deep, visible from above ; nasal 

 entire or divided ; suture between the internasals usually as long 

 as that between the praefrontals, or a little shorter ; frontal longer 

 than its distance from the end of the snout, shorter tban the 

 parietals ; loreal longer tban deep, usually entering the eye ; one 

 or two praoculars ; two postoculars ; temporals 2 + 2 or 2 + 3; 7 

 (exceptionally 8 or 6) upper labials, third and fourth entering the 

 eye ; 3 or 4 labials in contact with the anterior chin-shields, which 

 are longer than the posterior. Scales in 13 rows. Ventrals 200- 

 243; anal divided; subcaudals 71-88. Whitish, with or without 

 small brown spots, and with large elliptic dark brown or black 

 spots much longer than the interspaces between them ; a large 

 brown spot nearly covers the upper surface of the head, and is 

 separated from the first dorsal spot by a narrow white occipital 

 band ; upper lip and lower parts uniform white. 



Total length 18 inches ; tail 3'5. 



ITdb. Southern India and Ceylon. 



358. Hydrophobus gracilis. 



Odontomus gracilis, Giinth. Rept. B. I. p. 234 ; Theob. Cat. p. 100. 

 Odontomus fergusonii, Haly, Taprobanian, iii, 1888, p. 51. 



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

 semidivided ; suture between the internasals as long as that 

 between the praefroutals ; frontal longer than its distance from the 

 end of the snout, shorter than the parietals ; loreal longer than 

 deep, entering the eye, separated from the supraocular by a small 

 prseocular ; two postoculars; temporals 2 + 3; 7 upper labials, 

 third and fourth entering the eye ; 4 lower labials in contact 

 with the anterior chin-shields, which are longer than the posterior. 

 Scales in 15 rows. Ventrals 200-234; anal entire; subcaudals 

 75-83. "Whitish, each scale brown in the centre, with large 



