HERPETOLOGY OF JAPAN. 



481 



p. 554 (southeastern Asia; Formosa). — Wall, Proc. Zool. 8oc. London, 

 1903, p. 99 (Hongkong; Formosa). — Lachesis graminea BoETroER, Kat. 

 Schl. Mus. Senckenberg. , 1898, p. 139 (south Formosa, etc.) 



1802. Coluber viridis Bechstein, Lacepede's Naturg. Amph.,- IV, p. 252, pi. 

 XXXIX, fig. 1 (type-locality, Vizagapatam, India; based on Russell's 

 Ind. Serp., I, pi. ix). — Trimeresurus viridis Lacepede, Ann. Mus. Paris 

 IV, 1804, p. 209. 



1839. Trigonocephalus erythrurus Cantor, Proc. Zool. Soc. London, 1839, p. 31 (type- 

 locality, Ganges Delta, India; type in Brit. Mus.; Cantor, collector. — 

 Trimeresurus ei-ythrurus , Gventher, Kept. Brit. India, 1864, p. 38G. — 

 _Swinhoe, Proc. Zool. Soc. London, 1870, p. 412 (Takow, Formosa). 



1842. Trimesurus albolabris Gray, Zool. Miscell., (p. 48) (type-locality, China; 

 types in Brit. Mus.; Reeves, collector). 



1853. Trimesurus elegans Gray, Ann. Mag. Nat. Hist. (2), XII, p. 391 (type-local- 

 ity, Sikkim; type in Brit. Mus.; Hooker, collector) (not Craspedocepha- 

 lus elegans Gray, 1849). 



Description (figs. 370-372) .—Adult male; U.S.N.M. No. 36516; 

 Taihoku (Taipa), Formosa; September, 1897; T. Tada, collector. 

 Rostral as liigh as broad, very narrow above, nearlv triangular 



371 



Figs. 370-372.— Trimeresurus gramineus. IJ x nat. size. 370, top of he.\d: 371, side of he.vd; 



372, UNDERSIDE OF HEAD. NO. 2o SCI. COLL. TOKYO. 



bordered behind by a single scale between the upturned anterior 

 corners of the nasal, just visible from above; canthus rostralis 

 sharp, formed anteriorly by the upturned edge of the nasal, the 

 upturned edge of an elongated shield corresponding to the loreal in 

 the other species here described and the upturned portion of the 

 upper preocular; head shields small, smooth anteriorly, keeled on 

 parietal and occipital regions; supraoculars very narrow, occupying 

 only the outer edge of the supraocular region, their width being 

 scarcely more than one-fifth the distance between them; about 12 

 scales on a line between the supraoculars; nasal large, smooth, undi- 

 vided, with a round nostril pierced near the lower edge; behind it 

 above, on the canthal ridge an elongated shic^ld, being the loreal of 

 the other species; below it, separating it from the first supralabial, 

 and between nasal and the upper portion of second supralabial which 



26485— No. 58—07 31 



