TEACHISCHIUM. 



Synopsis of the Species. 



A. Scales iu 13 rows, those of the ischiadic region 

 keeled in the males. 



a. Praefrontal shield usually undivided ; one 



postocular ; 150 ventrals or more T. fuscum, p. 285. 



b. Preefrontal shield usually undivided ; one 



postocular : 134-145 ventrals T. yuentheri, p. 285. 



c. Two prsef rentals ; two postoculars T. tenuiceps, p. 280. 



13. Scales in 15 rows, all smooth. 



a. Sixth upper labial largest T. monticola, p. 28(5. 



b. Last three upper labials sub equal T. rubriventcr, p. 286. 



336. Trachischium fuscum. 



Calamaria fusca andC. obscm'o-striata, Blyth, J. A' 8. B. xxiii. 1854, 



p. 288. 



Trachischium rugosuui, Giinth. Cat. Col. Sn. p. 30. 

 Trachischium fuscum, Gunth. P. Z. S. 1860, p. 161 ; Theob. Cat. 



Rept. As. Soc. Mus. 1868, p. 45 ; Anders. P. Z. S. 1871, p. 171 ; 



Theob. Cat, p. 144. 

 Ablabes fuscus, Giinth. Rept. B. I. p.22p._ ^ lK 



Kostral as broad as deep or a little deeper than broad, visible 

 from above ; siiture between the internasals very short ; prsefrontal 

 usually single ; frontal longer than its distance from the end of the 

 snout, two thirds or three fourths the length of the parietals ; 

 loreal longer than deep ; one prse- and one postocular ; temporals 

 1 + 2; 6 upper labials, third and fourth entering the eye, first 

 smallest, sixth largest ; 4 lower labials in contact with the anterior 

 chin-shields ; posterior chin-shields small. Scales in 13 rows ; 

 those on the sides of the anal and basicaudal regions obtusely keeled 

 in the male. Ventrals 150-162 ; anal divided ; subcaudals 33-42. 

 Dark brown or black above and below, with or without more or less 

 indistinct lighter longitudinal streaks above. 



Total length 20 inches ; tail 2-5. 



Hob. Eastern Himalayas (3000-7000 feet), very common in Sik- 

 him ; Khasi Hills ; Eangoon ? (Blyth). 



337. Trachischium guentheri. 



Trachischium obscuro-striatum (non Blyth), Giinth. P. Z. S. 1860, 

 p. 161. 



Rostral as broad as deep or a little deeper than broad, visible 

 from above ; suture between the iuternasals very short ; prae- 

 frontal usually single ; frontal longer than its distance from the 

 end of the snout, two thirds the length of the parietals ; loreal 

 longer than deep ; one pra3- and one postocular ; temporals 1+2 ; 

 6 upper labials, third and fourth entering the eye, first smallest, 

 sixth largest; 4 lower labials in contact with the anterior chin- 

 shields; posterior -oV^i-shields small. Scales in 13 rows; male 



