36 COLUBRID, 
with apical pits, in 19 rows; ventrals rounded or obtusely angu- 
late laterally. Tail long; subcaudals in tworows. Hypapophyses 
developed throughout the vertebral column. 
Madagascar. 
Maxillary and mandible of Langaha nasuia. 
Synopsis of the Species. 
Rostral appendage twice as long as the 
snout, ensiform, not serrated ........ 1. nasuta, p. 36, 
Rostral appendage once and a half to once 
and two thirds as long as the snout, 
tapering to a sharp point, and serrated 
above at the end .........00cecaee 2. intermedia, p. 37. 
Rostral appendage not more than once and 
a half as long as the snout, serrated 
above and beneath .............08- 3. erista-galli, p. 37. 
1. Langaha nasuta. 
Brugnitre, Journ. de Phys. xxiv. 1784, p. 182, pl. ii. 
Langaha nasuta, Shaw, Nat. Misc. xxii. pl. emlxviii, —(?); Giinth. 
Cat. p. 162 (1858) ; Boetig. Abh. Senck, Ges, xi, 1878, p. 270, and 
1879, p. 467, and xii. 1881, p. 447. 
Amphisbena langaha, Schneid. Hist. Amph, ii. p. 357 (1801). 
Langaha madagascariensis, Daud. peg vii. PS 40 (1803). 
Dryiophis langaha, awe. § Phys. Serp ah 8 (1837), pen Abbild. 
p- 20, pl. vii., & pl. viii. figs. 7-11 (183 ). 
Langaha ensifera, um. § Bibr. vii. : 803 (1854) ; Jan, Icon. Gén- 
33, pl. vi. fig.'2 (1869). 
Head narrow and elongate, ending in a long, ensiform, three- 
edged rostral appendage, covered with imbricate scales, which gradu- 
ally tapers to a sharp point; the length of this appendage about 
twice the length of the snout, and five to six times its basal depth ; 
rostral nearly twice as broad as deep; a pair of more or less 
regular, enlarged prefrontal shields; frontal narrow, its anterior 
width about equal to the posterior width of the supraocular ; one, 
two, or three loreal shields; two pre- and four postoculars; tem- 
porals small, scale-like; eight upper labials, fourth and fifth 
entering the eye; three pairs of chin-shields bordering the mental 
groove. Scales rather strongly keeled, in 19 rows. Ventrals 145- 
152; anal divided (rarely entire); subcaudals 136-153, Pale 
brown to brick-red above, uniform, or with ill-defined small black 
spots ; upper lip and lower parts yellow or orange, the belly and tail 
