8 PEOCEEDINGS OF THE ISTATIOISTAL MUSEUM vol. 72 



tion is therefore here adopted. The three forms may then be dis- 

 tinguished as follows: 



«■.' Iiiternasals large and usually broadly iu contact; nasal and first labial 

 usually fused into one shield ; nasal and anterior pit shield in contact, 

 usually without any intercalated scales; gular scales bordering groove 

 usually large, rather rounded, and arranged in pairs, 



T. gramineus gramineus. 

 a.' Interuasals small and separated by one or more scales ; nasal and first 

 labial nearly always separated by suture; usually one or two small 

 scales between the nasal and the anterior pit shield; gulars, including 

 those bordering groove, small and unmodified, scalelike in a majority of 

 specimens. 



&.' Scale rows around middle of body 21, rarely 23, . 



T. gramineus stejnegeri. 

 &.^ Scale rows 19 T. gramineus yunnanensis. 



It remains to point out the possibility that further investigations 

 of Indian material may reveal characters or combination of charac- 

 ters which can serve to diagnose other forms. In that case the 

 Chinese lowland form may have to be Imown as T. gramiineus albola- 

 5m, but not till then. Similarly the Himalayan specimens may re- 

 quire a new name if they should turn out to differ from T. grcmiineus 

 stejne§eri. 



TRIMERESURUS GRAMINEUS GRAMINEUS (Shaw) 



1802. Coluber gramineus Shaw, Gen. Zool., vol. 3, pt. 2, p. 420 (type locality, 

 Vizagapatam, India; based on Russell's Ind. Serp., vol. 1, pi. 9). — Trir 

 meresurus gramineus Gxtentheb, Rept. Brit. India, 1864, p. 385 (part: 

 Pinang; Mergui). — Botxlengeb, Fauna Brit. India, Rept. 1890, p. 429. — 

 BoETTGEE, Ber. Senckenberg. Nat. Ges., 1894, p. 185 (Hainan). — Stan- 

 ley, Journ. N. China Asiat. Soc, vol. 46, 1915, p. xiii (part: Swatow) ; 

 vol. 47, 1916, p. xiv (Hoihow; Foochow). — Malc. Smith, Journ. Nat. 

 Hist. Soc. Siam, vol. 6, 1923, p. 205 (Hainan). — Lachesis granmwus 

 BoTJLENGEK, Cat. Snakes Brit. Mus., vol. 3, 1896, p. 554 (part: India, 

 Burma, Siam, Hongkong, Sumatra, Java, Timor).— Wall, Proe. Zool. 

 Soc. London, 1903, p. 99 (part: Hongkong). 



1802. Coluber viridis Bechstein, LacepSde's Naturg. Amph., vol. 4, p. 252, pi. 

 39, fig. 1 (type locality, Vizagapatam, India; based on Russell's Ind. 

 Serp., vol. 1, pi. 9) {not of Meuschen, 1778). — Trimeresurus viridis 

 LacepSde, Ann. Mus. Paris, vol. 4, 1804, p. 209. — Bothropjiis viridis 

 FiTziNGER, Sitz. Ber. Akad. Wiss. Wien, Math. Nat. Kl., vol. 42, 1861, 

 p. 411 (Hongkong).- — Trhnesurus viridis Gray, Cat. Snakes Brit. Mus., 

 1849, p. 7 (India). 



1839. Trigonocephalus erythurus Cantor, Proc. Zool. Soc. London, 1839, p. 31 

 (type locality, Ganges Delta, India, type in British Museum; Cantor, 

 collector). — Trimeresurus erythrurus Guenthee, Rept. Brit. India, 1864, 

 386 (India, Siam, south China, Java). — Steindachneb, Reise Novara, 

 Rept. 1867, p. 86 (Hongkong, Cochin China, Java). — ^Stoliczka, Journ. 

 Asiat. Soc. Bengal, vol. 39, pt. 2, 1870, p. 207 (Moulmein, Upper Burma, 

 Penang, Wellesley Prov., Java). — Anderson, Zool. Res. Exped. West 

 Yunnan, 1879, p. 830 (Upper Burma). — Boettgeb, Offenbach. Ver. 

 Naturk., 24-25 Ber., 1885, p. 157 (Kwangtung). 



