128 THE SNAKES OF SOUTH AFRICA. 
I. CALAMELAPS WARRENI. Warren’s Snake (recently discovered). 
Colour—Uniform plumbeous grey. 
Average length—tr foot. 
Distribution—Zululand. 
. CALAMELAPS CONCOLOR. Purple-glossed Snake. 
Synonyms—Choristodon concolor ; Calamelaps miront. 
Colour—Greenish black above, with a purple gloss; pale blackish 
purple beneath, the shields margined behind with livid white. 
Average length—1 foot. 
Distribution—Natal, Caffraria. 
tN 
Genus MACRELAPS. 
There is only one Species in this Genus. 
NPY LO EEE SEB CIES: 
Scales in 25 or 27 rows ; no preocular. Refer to synopsis of the genera 
of the sub-family Dipsadomorphine. 
1. MACRELAPS MICROLEPIDOTUS. Natal Black Snake. Zwart Slang. 
Synonym—Uriechis microlepidotus. 
Colour— Uniform black. 
Average length—2z feet 6 inches. 
Distribution—Eastern parts of Cape Celony ; Natal. 
Genus APARALLACTUS. 
Two Species in South Africa. 
KEYSTO THE SPECIES. 
Nasal divided ; ventrals 153-180 Bs .. Aparallactus guentheri. 
Nasal entire ; ventrals 138-166 ote .. Aparallactus capensis. 
. APARALLACTUS GUENTHERI. Guenther’s Snake. 
Synonym—Uriechis capensis. 
Colour—Blackish brown above, a little lighter beneath; chin and 
throat yellowish white ; a deep black collar, edged with yellowish 
white in front and behind, narrowly interrupted on the throat. 
Average length—1 foot. 
Distribution—Southern Rhodesid® Angola; East and Central Africa. 
2. APARALLACTUS CAPENSIS. Black-headed Snake. Zwart-kop Slang. 
Synonyms—Elapomorphus capensis ; Uriechis capensis. 
~ Colour—Yellow or pale reddish brown above, with or without a blackish 
vertebral line, yellowish white beneath ; upper, surface of head 
and nape black, with or without a yellowish cross-bar behind 
the parietal shields, the black of the nape descending to the 
sides of the neck; sides of head yellowish, the shields bordering 
the eye, black. 
Average length—1 foot. 
Distribution—Eastern parts of Cape Colony; Orange River Colony ; 
Basutoland; Zululand; Transvaal; Southern Rhodesia; East 
Africa, 
