AMBLTCEPHALUS. 415 



broad snout ; eye moderate and with vertically elliptical pupil ; 

 head-shields large. Body moderate or slender, compressed ; scales 

 smooth or feebly keeled, in 15 rows, without pits ; ventrals 

 rounded; tail moderate or short, prehensile; subcaudals in two 

 rows. 



Distribution. This genus includes eight species, inhabiting South- 

 ern China, Burma, the Eastern Himalayas, Assam, Cochinchina, 

 Siam, the Malay Peninsula, and the Malay Archipelago. They are 

 nocturnal and feed on insects. 



8y*opti of Indian and Burmese Species. 



A. Scales of vertebral row enlarged; a single 



shield between nasal and eye, which rests on 

 one or more labials. 



a. Frontal longer than broad ; ventrals 188- 



194 ; subcaudals 70-87 A. monticola, p. 415. 



b. Frontal as broad as long ; ventrals 150-170 ; 



subcaudals 34-46 A. kevis, p. 415. 



B. Scales of vertebral row not enlarged; loreal 



and prseocular distinct; eye separated from 

 labials by one or more suboculars. 



a. One prseocular, one postocular, and one sub- 



ocular A. andersonii, p. 416. 



b. Two prseoculars, one postocular, and one sub- 



ocular A. modestus, p. 416. 



c. One pra5ocular, one postocular, and 3 or more 



suboculars A. maciilarius, p. 416. 



514. Amblycephalus monticola. 



Dipsas monticola, Cantor, P. Z. S. 1839, p. 53. 



Pareas monticola, Giinth. Rept. B. I. p. 327 ; Anders. P. Z. S. 1871, 

 p. 188 ; Theob. Cat. p. 203. 



Internasals not quite half as long as the prefrontals ; latter 

 entering the eye ; frontal a little longer than broad, a little shorter 

 than the parietals; loreal entering the eye; a small praeocular 

 below the loreal ; two postoculars ; temporals 2 + 3 ; upper labials 

 7, fourth or fourth and fifth entering the eye ; three pairs of large 

 chin-shields. Scales in 15 rows, smooth ; vertebrals enlarged, hex- 

 agonal. Ventrals 188-194 ; anal entire ; subcaudals 70-87. 

 Brown above, with vertical blackish bars on the sides ; a black line 

 from above the eye to the nape, and another from behind the eye 

 to the angle of the mouth ; yellowish below, dotted with brown. 



Total length 2 feet ; tail 5| inches. 



Hob. Eastern Himalayas, Khasi and Naga Hills. 



515. Amblycephalus Isevis. 



Amblycephalus laevis, oie, Isis, 1827, p. 520. 



Pareas Isevis, Dum. fy Bibr. Erp. Gen. vii, p. 442 ; Giinth. Rept. 



B. I. p. 328 ; Theob. Cat. p. 203. 

 Leptoguathus leevis, Jan, Icon. Ophid. 37, pi. vi, fig. 4. 



