TRIMERESURUS 291 



Trimeresunis erythrunis Gunther, Rept. Brit. India (1864) 386; 

 Stoliczka, Journ. As. Soc. Bengal 39 (1870) 217; Fayrer, Than- 

 atoph. Ind. (1874) pi. 14; Theobald, Cat. Rept. Brit. India (1876) 

 220; MtJLLER, Verh. Nat. Ges. Basel 8 (1887) 280; Boettger, Ber. 

 Senck. Nat. Ges. (1886) 119. 



Lachesis gramineus BouLENGER, Cat. Snakes Brit. Mus. 3 (1896) 

 554; Boettger, Kat. Schl. Mus. Senck. (1898) 139. 



Descrij)tion of species. — (From Stejneger, Bull. U. S. Nat, 

 Mus.) "Adult male; U. S. N. M. No. 36516; Taihoku (Taipa), 

 Formosa; * * * Rostral as high as broad, very narrow 

 above, nearly triangular bordered behind by a single scale be- 

 tween the upturned anterior corners of the nasal, just visible 

 from above ; canthus rostralis sharp, f onned anteriorly by the up- 

 turned edge of the nasal, the upturned edge of an elongated shield 

 corresponding to the loreal * * * and the upturned portion 

 of the upper preocular; head shields small, smooth anteriorly, 

 keeled on parietal and occipital regions ; supraoculars very nar- 

 row, occupying only the outer edge of the supraocular region, 

 their width being scarcely more than one-fifth the distance be- 

 tween them ; about 12 scales on a line between the supraoculars ; 

 nasal large, smooth, undivided, with a round nostril pierced near 

 the lower edge ; behind it above, on the canthal ridge an elongated 

 shield, 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 enters the pit, two small 

 scales, one above the other, two elongate anterior preoculars, 

 the upper, which is somewhat wider anteriorly turned up over 

 the canthal ridge, the lower forming the upper border of the 

 large pit; the subfoveal as large as the lower preocular, pos- 

 teriorly entering eye between the latter and the subocular; a 

 long, narrow, crescentic subocular anteriorly in contact with 

 subfoveal, separated from fourth and subsequent supralabials 

 by one and posteriorly two rows of scales; three small post- 

 oculars on left side, two on right; temporals numerous, lower 

 ones largest, upper ones smaller, keeled ; 10 supralabials, first 

 small, triangular, second very high, forming anterior border 

 of pit, third largest, fourth slightly larger than fifth to tenth, 

 which are subequal; 3 lower labials in contact with anterior 

 chin-shields, posterior chin-shields scarcely differentiated; 21 

 rows of narrow, pointed, keeled scales without apical pits; 161 

 ventrals ; anal entire ; 69 pairs of subcaudals ; tip of tail rather 

 blunt. Color (in alcohol) above saturated uniform 'parrot- 

 green,' from the subocular, under the center of the eye, a narrow, 

 strongly defined, pale-yellowish line, the lower row of temporals 



