155 



in contact with the supraciliaries; the large anterior one in 

 contact with the loreal; temporal scales keeled. Seven upper 

 and five lower labials; mental much larger than the latter; 

 on each side along the throat three large shields, the anterior 

 two pair forming a suture; collar distinct (fig. 66). Body 

 elongate; six or eight longitudinal series of strongly keeled 

 shields on the nape, four on the back, median pair largest. 

 Ventral shields in lo or 12 longitudinal series, strongly keeled. 

 One to six inguinal pores on each side; 

 median praeanal scale very large. Tail cy- 

 lindrical, very long, covered with strongly 

 keeled scales, the keels forming longitudinal 

 series. Limbs long; digits long and slender, 

 compressed, with smooth, tubercular lamel- 

 lae below, the distal one enlarged. 



Greenish or greyish-brown above, with 

 metallic gloss; a more or less distinct 

 whitish, black-edged streak from the supra- 

 ciliary edge along each side of the back 

 to the base of the tail; the black band 

 bordering the light streak beneath, begins 

 on the loreal region and passes through 

 the eye and above the tympanum; some- 

 times the black band is represented by two 

 narrow black lines; sides often with small 

 light-greenish spots. Lower parts yellowish or greenish. Length 

 of head and body 61 mm.; tail 285 mm. 



N o m. i n d i g. Bengkarong ular. 



Habitat: Sumatra (Atjeh, Tandjong, Indragiri, Tandjung 

 Laut, Palembang!, Bunga Maas, Padang, Gunung Sahilan!); 

 Banka; Java (Buitenzorg!, Sukabumi!, Tengger Mts., 1200 M.); 

 Borneo (Matang, Sarawak, Kuching, Sintang, Singkawang, Pon- 

 tianak, Bandjermassin, Mt. Kenepai, Sebruang Vally); Natuna 

 Islands (1000 feet). — Malacca; Burma; Eastern Himalayas; 

 Assam; Indo-China; Southern China. 



Lives in high grass. 



Fig. 66. Tathydromus 



sex/meaiusDaxxd. Throat 



with collar X ^Va- 



