440 AMBLYCEPHALIB-^. 



Dipsas boa, SchUg. Phys. Serp. ii. p. 284, pi. xi. figs. 29 & 80 



(1837) ; Cantor, Cat. Mai. Rept. p. 78, pi. xl. flg. 3 (1847). 

 Aplopeltura boa, Dum. ^ Bihr. vii. p. 444 (1854). 

 Haplopeltura boa, Boettg. Ber. Offenb. Ver. Nat. 1892, p. 134. 



Snout very short and deep. Eostral narrow, once and a half to 

 twice as deep as broad, just visible from above ; internasals shorter 

 than the prsefrontals ; frontal not broader than the supraocular, 

 once and two thirds to twice as long as broad, longer than its 

 distance from the end of the snout, as long as or a little longer than 

 the parietals ; two or three enlarged occipitals ; two or three super- 

 posed loreals, the lower often entering the eye, which is bordered 

 by six to eight shields in addition to the supraocular ; temporals 

 3+3 or 4 ; eight to ten upper labials, none entering the eye ; two 

 pairs of lower labials in contact on the median line behind the 

 symphysial ; three or four pairs of large chin-shields, the anterior 

 pair sometimes fused to a single azygous shield or preceded by an 

 azygous shield. Scales in 13 rows, vertebrals strongly enlarged. 

 Ventrals 148-170 ; anal entire ; subcaudals 88-120. Yellowish 

 or pale brown above, yellowish beneath, mottled with dark brown ; 

 usually with large dark brown blotches, which may extend across 

 the belly ; a large dark brown blotch on the head ; sides of head 

 yellowish white, with three or more dark streaks radiating from the 

 eye. 



Total length 750 millim. ; tail 220. 



Pinang, Borneo, Philippines, Java, Moluccas. 



a-h. 2 (V. 167, 160; Pinang. Dr. Cantor. 



0. 106, 108). 



^. Hgr. (V. W5 ; C. 107). Sarawak. Sir H. Low [P.]. 



d. S (V. 158 ; 0. 120). Baram, Sarawak. C. Hose, Esq. [C.]. 



e. 2 (V. 163 ; C. 116). Borneo. 



/. $ (V. 156 ; 0. 100). Palawan. A. Everett, Esq. [0.1. 



^. c? (V. 162 ; 0. 88). Balabac. A. Everett, Esq. [0.1. 



h. 2 (V. 148 ; 0. 98). Philippines. H. Cuming, Esq. 



[C.]. 



i. S (V. 160 ; C. 99). Java. Leyden Museum. 



k. Hgr. (V. 165 ; C. 97). Java. Dr. Horsfield [PA 



I. 5 skeleton. Sarawak. A. Everett, Esq. [C.j. 



2. AMBLYCEPHALUS. 



AmMycephalus, Euhl, Isis, 1822, p. 474 ; Boie, Isis, 1827, p. 519 ; 



Bouleng. Faun. Ind., Sept. p. 514 (1890). 

 Pareas, Wagler, Syst. Amph. p. 181 (18-30) ; Dum. §• Bibr. Erp. Gin. 



vii. p. 438 (1854) ; Oiinth. Cat. Col. 8n. p. 184 (1858), and Rept. 



Brit. Ind. p. 326 (1864). 

 Dipsas, part., Schleg. Phys. Serp. ii. p. 267 (1837). 

 Leptognathus, part., Jan, Elenco sist. Ofid. p. 100 (1863). 

 Asthenodipsas , Peters, Mon. Berl. Ac. 1864, p. 273. 



Maxillary bone very short, deep, with 5 or 6 subequal teeth ; 

 mandibular ^teeth gradually decreasing in length. Head distinct 



