1871.] DR. J. ANDERSON ON INDIAN REPTILES. 185 



Tragops frasinus, Reinw. ; Gthr. I. c. p. 303. 



In the largest specimen the fourth upper labial does not enter the 

 margin of the lip, and the seventh and eighth are nearly completely 

 united. On the left side there are nine labials, but the fourth is 

 divided longitudinally ; and an arrangement similar to this occurs on 

 both sides of the other specimen. 



Darjeeling, 3200 feet. 



The most common Tree-Snake in Bengal is Passerita mycterhans, 

 which is very prevalent in the neighbourhood of Calcutta. 



Dipsas hexagonata, Blyth, Journ. As. Soc. Bengal, xxiv. p. 360. 



Dipsas multifasciata, Blyth, Journ. As. Soc. xxix. 18*1, p. 114; 

 Stol. J. As. Soc. xxxix. 1870, p. 119. 



Scales smooth, in twenty-one rows ; a single apical groove. Ver- 

 tebral series enlarged, hexagonal, elongated on the anterior part of 

 body, short and broad behind. Ventrals 232-248 ; caudals 

 108-125. 



One, sometimes two, praeocular, reaching to the upper surface of 

 the head ; vertical nearly as broad as long, margin straight or slightly 

 convergent. Loreal of moderate size, quadrangular, rather higher 

 than long or square ; two postoculars ; eight upper labials, the third, 

 fourth, and fifth entering the orbit. Temporals irregular, varying 

 from 1 + 2, 2 + 2, 2 + 3, to 3 + 3, with one, two, or three temporals 

 in contact with the oculars. Eleven teeth in each upper jaw, in- 

 creasing in length from before backwards, the last grooved. Uniform 

 dark reddish brown or dark olive reddish brown above ; a faint dark 

 line behind the eye in some, absent in others. The surface of the 

 head is faintly and minutely speckled with brown ; under surface 

 coral-red or pale pinkish-yellow anteriorly, deepening from before 

 backwards. Young specimens show an irregular line of white spots 

 margined below with black on the angle of the ventrals ; the body 

 with a series of five black transverse zigzag lines. General colour 

 above bright brick-red ; below white anteriorly, darkening to red 

 posteriorly. 



Hah. Darjeeling, 2300 feet ; Bengal ; Andamans. 



Blyth's type of D. hexagonata is no longer in the Museum ; but 

 some young specimens from the Andamans referred to this spe- 

 cies agree with my specimens in all essential particulars, even to 

 the variation of the temporals. Some of them, however, have a 

 small defined black spot in the centre of the vertical and on each 

 occipital, which do not occur in any of the specimens before me ; all 

 the other markings are the same. The temporals are 3+3 and 

 2 + 3, two or three in contact with oculars. This species is separated, 

 from D. bubalina by its coloration, which is uniformly bright pink- 

 ish red or reddish brown, paler beneath. 



