LO. TROPIDONOTUS. 227 



above ; nostrils directed upwards ; internasals uarrow, shorter than 

 the ])roofroiitals ; frontal twice as long as broad, longer than its 

 distance from the end of the snout, shorter than the pariotals ; loreal 

 longer than deep ; one pra)- and two postoculars ; temporals 1+2; 

 eight upper labials, fourth and fifth entering the eye ; four lower 

 labials in contact with the anterior chin-shields, which are shorter 

 than the posterior. Scales perfectly smooth, in 1 9 rows. Ventrals 

 175 ; anal entire ; subcaudals 76. Black, ventrals and subcaudals 

 yellowish on the sides. 



Total length 850 milUm. ; tail 200. 



Africa ? 



a. J (V. 176; C. 76). ? Chatham Museum. (Type.) 



27. Tropidonotus olivaceus. 



Coronella olivacea, refers, Mon. Bcrl. Ac. 1854, p. 622; Gilnth. Cat. 



p. 39 (1858) ; Bocage, Jorn. Sc. Li.sb. i. 18G6, p. 66; Peters, Heise 



n. Mossamh. iii. p. li4, pi. xvii. tig. 1 (1882); Mocquard, Bull. 



Soc. Philom. (7) xi. 1887, p. 66, and Mem. Cent. Soc. Fhilom. 1888, 



p. 128. 

 (Meizodon) dumerilii, Gilnth. Proc. Zool. Soc. I860, p. 429, 



Enicognathus punctatostriatus, Jan, Arch. Zool. Anat. Phys. ii. 1868, 



p. 278, and Icon. Gen. 16, pi. iv. fig. 4 (1806). 

 Neusterophis atratus, Peters, Mon. Berl. Ac. 1877, p. 614, pi. — . 



tig. 1 ; Gilnth. Proc. Zool. Soc. 1888, p. 51. 

 Coronella (Mizodon) olivacea, Boettg. Ber. Senckenh. Ges, 1888, 



p. 48. 



Eye moderate, liostral a little broader than deep, Tisible from 

 above ; internasals as long as broad, as long as or a little shorter 

 than the pr?efrontals ; frontal once and two thirds to twice as long 

 as broad, longer than its distance from the end of the snout, 

 shorter than the parietals ; loreal as long as deep or deeper than 

 long ; one (rarely two) proe- and three (exceptionally two) post- 

 oculars : temporals 1 + 2; eight upper labials, fourth and fifth 

 entering the eye : four or five lower labials in contact with the 

 anterior chin-shields, which are shorter tlian the posterior. Scales 

 in 19 rows. Ventrals 131-149; anal divided; subcaudals 55-85. 

 Olive or brown above, with a more or less distinct darker vertebral 

 band, four or five scales wide, bordered on each side by a series of 

 whitish dots ; flanks and ends of ventrals olive ; upper lip yellowish, 

 the sutures between the shields black ; ventrals yellowish, some- 

 times edged with olive. 



Total length 580 miUira. ; tail 145. 



Tropical Africa. 



a-b,c. c? (V. 138; C. ?), South of Chartoum. Consul retherick 

 2 (V. 136; C. 59), [C] 



&yg.(V.131; C.71). 



q2 



