162 COLUBEID^. 



Paammopliis sibilans, part., Oiinth. Cat. p. 136 ; Schreib. Herp. Eur, 

 p. 217 (1875). 



moniliger, var. bilineatus, Peters, Mon. Berl. Ac. 1867, 



p. 237. 



'- sibilans, var. mossambica, Peters, Eeise n. Mossamb. iii. p. 122 



(1882).- 

 sibilans, var. intermedius, Fischer, Jahrb. Samh. Wiss. Anat, i. 



1884, p. 14. 

 sibilans, var. leopardina. Socage, Jorn. So. Lisb. xi. 1887, 



p. 205. 



irregularis, MatscMe, Mitth. deutsch. Schutzgeb. -vi. 1893, 



p. 212. 



sibilans, var. 0, Bocage, Herp. Angola, p. 116 (1895). 



Snout once and a half to twice as long as the eye. Eostral as 

 deep as broad ; nostril between two or three shields ; internasals 

 about half as long as the praefrontals ; frontal once and three 

 fourths to twice and one third as long as broad, narrower, in the 

 middle, than the supraocular, as long as or longer than its distance 

 from the end of the snout, as long as or a little longer than the 

 parietals ; loreal once and two thirds to twice and a half as long as 

 deep ; one prseocular (rarely divided), in contact with or narrowly 

 separated from the frontal ; two (rarely three) postoculars ; tem- 

 porals 2+2 or 3 (rarely 3+3) ; eight (rarely nine) upper labials, 

 fourth and fifth (or fifth and sixth) entering the eye ; four or five 

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

 long as or shorter than the posterior. Scales in 17 rows. Ventrals 

 155-198; anal divided; subcaudals 90-116. Coloration very 



Total length 12] millim. ; tail 380. 

 Tropical Africa and Egypt. 



A. Olive or brown above, the scales mostly black-edged ; a more or 

 less distinct, narrow yellow vertebral line and a broader 

 yellow streak along each side of the back ; head with yellow, 

 black-edged longitudinal streaks in front, and transverse ones 

 behind, which markings, however, may become very indistinct 

 in the adult ; upper lip yellowish white, uniform or with a few 

 brown or black dots on the anterior shields ; lower parts, 

 including lower half of outer row of scales, yellowish white, 

 uniform or with a faint brown lateral line. 



a. (J (V. 165 ; C. 103). Beltim, between Eo- Dr. J. Anderson [P.]. 



setta and Damietta. 



6. <? (V. 166; 0.?). Abassiyeh, near Cairo. Dr. J. Anderson [P.]. 



c-(?. d (V. 164 ; C. 108) Abu Roash, Gizeh. Dr. J. Anderson [P.]. 



& 2 (V. 158 ; C. ?). 



£_/. (J (V; 167 ; C. 109) Fayoum. Dr. J. Anderson [P.]. 



& 2 (V. 166 ; 0. 109). 



o. 2 (V. 169 ; C. 114). Minia. Dr. J. Anderson [P.]. 



h. Hgr. (V. 170 ; C. ?). Anseba Valley, Abys- W. T. Blanford, Esq. 



sinia. [P.]. 



