_Habitat_: Himalayas, Bengal, Assam, Burma, Malay Peninsula, Andaman and Nicobar Islands, Pulo-Pinang, Sumatra. IV. Scales in 21 rows (rarely 19 or 23); 7-13 series of scales between the supraoculars; tail _more or less prehensile_. (10) _L. gramineus_ (Syn. _Trimeresurus gramineus_. The Green Pit Viper).--145-175 ventral scales; 53-75 subcaudals; snout slightly projecting; supraocular shield narrow. Colour bright green, rarely olive or yellowish, with or without darker transverse bands; end of tail yellow or red; belly green, yellow, or white. Total length, 870 millimetres; tail 150. _Habitat_: South-eastern Asia, Darjeeling, Himalayas, Ganges Delta, Siam, Southern China, Hong Kong, Formosa, Java, Sumatra, Timor. [Illustration: FIG. 33.--_Lachesis flavomaculatus._ (After G. A. Boulenger, _op. cit._)] (11) _L. flavomaculatus_ (fig. 33).--170-187 ventral scales; 53-73 subcaudals; snout projecting, obliquely truncate; supraocular shield narrow. Colour bright green or olive, sometimes barred with reddish-brown; belly green, olive, or greenish-yellow; end of tail sometimes red. Total length, 1,060 millimetres; tail 160. _Habitat_: Philippine Islands. (12) _L. sumatranus._--180-191 ventral scales; 58-82 subcaudals; supraocular shield large. Coloration bright green, with or without black transverse bands; yellowish band on each side; belly yellow or green, with or without black speckles; end of tail red. Total length, 1,100 millimetres; tail 180. _Habitat_: Singapore, Sumatra, Borneo, Palawan. (13) _L. anamallensis._--138-158 ventral scales; 44-58 subcaudals. Colour green, olive, yellowish, or reddish-brown; a black temporal band; belly pale green, olive, or yellow; tail usually black and yellow. Total length, 730 millimetres; tail 110. _Habitat_: Anamallay and Nilgherry Hills, South India. (14) _L. trigonocephalus._--Scales in 17-19 rows, 145-170 ventrals; 53-67 subcaudals. Coloration green, with or without black transverse bands or spots; a black temporal streak; belly green or yellow; end of tail usually black. Total length, 790 millimetres; tail 130. _Habitat_: Ceylon. (15) _L. macrolepis._--Scales in 13-15 rows; 134-143 ventrals; 48-56 subcaudals. Colour bright green or olive; belly pale green. Total length, 680 millimetres; tail 120. _Habitat_: Southern India. B. First lower labial shield divided; the portion separated off forms a pair of small supplementary dental shields; 144-176 ventral scales; 38-57 subcaudals; tail _prehensile_. (16) _L. puniceus._--Scales in 21-23 rows; 12-14 series of scales between the supraocular shields. Colour grey, brown, or red; belly spotted with brown; end of tail red. Total length, 640 millimetres; tail 90. _Habitat_: Sumatra, Java, Borneo, Natuna Islands. (17) _L. borneensis._--Scales in 19-21 rows; 10-11 series of scales between the supraocular shields; 152-168 ventrals; 43-65 subcaudals. Total length, 770 millimetres; tail 105. _Habitat_: Borneo, Sumatra.