10. TliOPIDONOTUS. 263 



71 . Tropidonotus flavifrons. 



Tropidonotns flavifrons, Boulen;/. Ann. ^- Mag. N. H. (5) xx. 1887, 

 1). 90 ; Mocf/iiard, Nouv. Arch. Mm. (3) ii. 1890, p. 140, j)!, ix. 

 iig. -2. 



Head short, very distinct from neck. Eye moderate. Internasals 

 broadly truncated in front, about half as large as the prefrontals ; 

 frontal once and a half as long as broad, longer than its distance from 

 the end of the snout, shorter than parietals ; loreal as deep as long ; 

 one pra?- and two or throe postoculars ; temporals 2 + 3 ; eight or 

 nine upper labials, fourth and tifth or hfth and sixth entering the eye. 

 kScales in 19 rows, feebly keeled, of outer row smooth. Ventrals 

 146-155 ; anal entire ; subcaudals 95-99. Olive above, with dark 

 network ; two parallel or alternating series of white spots along 

 each side, upper on the sixth scale from the ventral, lower larger 

 and on the outer border of the ventral ; a large yellow spot covers 

 the forehead and snout ; sutures between the labials black ; ventrals 

 whitish, with largo black spots ; the black predominates on the 

 subcaudals. 



Total length 540 millim. ; tail 179. 



Mt. Ivina Baloo, Xorth Borneo. 



a. (S (V. 148; C. 95). Kiua Baloo. Mr. Whitehead [C ]. 



Paris Museum [E.]. 



72. Tropidonotus callistus. 



Tropidonotus callistus, Gilnth. Froc. Zool. Son. 1873, p. 170, 

 pi. xvii. fig, C ; Peters ^- Dona, Ann. Mus. Genova, xiii. 1878, 

 p. 388. 



Head short and thick, very distinct from necK. Eye large. 

 Rostral broader than deep, scarcely visible from above ; internasals 

 longer than broad, broadly truncate in front, longer than the 

 priefrontals ; frontal once and two thirds as long as broad, longer 

 than its distance from the end of the snout, a little shorter than 

 the parietals ; loreal deeper than long ; one prae- and four post- 

 oculars ; temporals 2 + -; nine upper labials, fourth, fifth, and 

 sixth entering the eye ; five or six lower labials in contact with the 

 anterior chin-shields, which are shorter than the posterior. Scales 

 in 21 rows, strongly keeled, of outer row feebly keeled. Ventrals 

 150 ; anal divided ; subcaudals 76. Black above, with a whitish 

 vertebral stripe with scolloped edge on its anterior half; around 

 white spot on each side beliind the head, and a white baud across 

 the anterior half of the frontal and supraoculars and on the pra^- 

 oculars ; upper labials wliite, with black sutures ; ventrals and outer 

 row of scales white, with a black baud on each side along the outer 

 ends of the ventrals. 



Total length 295 millim. ; tail 70. 



Celebes. 



a. Ifgr. (V. 156 ; C. 76). N. Celebes. Dr. A. B. Mever TC.]. 



(Type.) ■ 



