218 COLUBRID. 
band along the back: sides variegated black and white ; belly dirty 
white, with a lateral] series of black spots, 
Total length 328 millim.; tail 106, 
Gold Coast. 
16. Tropidonotus swinhonis. 
Tropidonotus swinhonis, Giinth. Ann. § Mag, N. H. (A) i. 1868, 
p. 420, pl. xix. fig. kK, 
Head narrow and elongate. Eye moderate. Rostral broader 
than deep, just visible from above ; internasals a little broader than 
long, shorter than the prefrontals; frontal once and a half as long 
as broad, as long as its distance from the end of the snout, shorter 
than the parietals ; loreal as long as deep ; one pree- and three post- 
oculars; temporals 142; six upper labials, third and fourth 
entering the eye, fifth very long ; four lower labials in contact with 
the anterior chin-shields, which are shorter than the posterior. 
Scales strongly keeled, of outer row faintly keeled, in 15 rows. 
Ventrals 150; anal divided; subcaudals circa 50. Brown above, 
anteriorly with irregular blackish spots ; occiput and nape reddish, 
with a broad black collar; a black spot below the. eye, and an 
oblique black band on the temporal region; lower parts yellowish, 
powdered with brown on the sides. 
Total length 580 millim. ; tail about 100. 
Formosa. 
a. 9 (V. 150; C.?). Formosa. R. Swinhoe, Esq. [C.]. (Type.) 
17. Tropidonotus nuchalis. (Pxrare XIII. fig. 1.) 
oe idonotus swinhonis, var., Giinth. Ann. § Mag. N. H. (6) iy. 
1889, p. 221. 
od nuchalis, Bouleng. Ann. § Mag. N. H. (6) vii. 1891, p. 281. 
Head as in 7. natrix. Eye moderate. Rostral broader than 
deep, just visible from above; internasals as long as broad or a 
little broader, as long as the prefrontals; frontal once and one 
third to once and a half as long as broad, as long as or longer than 
its distance from the end of the snout, a little shorter than the 
parietals ; loreal as long as deep, or deeper; one pree- and two or 
three postoculars; temporals 1+ 1 or 1+2; six upper labials, third 
and fourth entering the eye, fifth very long; four lower labials in 
contact with the anterior chin-shields, which are shorter than the 
posterior. Scales very feebly keeled, of outer row smooth, in 15 
rows. <A very distinct groove along the middle of the nape. 
Ventrals 154-165; anal divided; subcaudals 46-50. Olive above, 
uniform or with small black spots ; an oblique black line below the 
eye, and another between the two last labials; lower parts uniform 
black, or black in the middle and olive on the sides. 
Total length 640°-millim. ; tail 120. 
China. 
a-d. 2 (V.154, 160, 161, Ichang, Upper Yang- A. E. Pratt, Esq. [C.). 
165 ; C. 50, 48, 47, 46). tse-Kiang, (1 'ypes.) 
