SOJIE INTEUESTINt; llEPTILES 
171 
subcauiliils from 100 to 111. Teeth in the up])er jaw, 27 to .'10. The smooth, reluceiit 
scales and the very long tail are characteristic of this, prohahly, aquatic snake. 
Luptodira (ittarensin, Werner 
.\n adult and two young specimens from Barhoi, White Nile, agreeing ])erfectly with 
the types from Khor Attar ; only the adult differs in having two praBoculars — the upper, 
however, not reaching the frontal. Possibly this species is identical with L. (lajeiu, Blngr., 
the description of which 1 overlooked when 2 Jreparing my synopsis of the African Ijiytmlird. 
Pnamiiiophin sihilaim, Linuieus 
Plate XX., fig. 3 
Three specimens — a young, a half-grown (Barhoi), and an adult ; the hitter 1-52 metres 
long (Bor); all belonging to the large aquatorial variety. 
Psatnmophis suhtaniaUis, Peters 
A male from Wau, new for the Egyptian Sudan. Total length, 870 mm.; tail, 300 mm.; 
number of ventrals, 165; of subcaudals, 113 pairs; eight ujsper labials, fourth and fifth 
entering the eye; three to four lower labials in contact with the anterior chin shields. 
This species, known hitherto from East Africa south of the Equator and from German 
South-West Africa (Boulenger, Cat Snaken III., j). IGO; and Werner, Verh. Zonl. hot. Gea. 
Wien, 1902, p. 370), is very similar to the preceding species, and, indeed, without comparing 
specimens, it will not be easy to distinguish them. 
1'. Kuhficuiatna is more slenderly built than the Sudanese P. sihilans ; the head is also 
narrower, the rostral somewhat broader than deej) (as dee^) as broad in sihilam), the 
loreal more elongate, and the coloration resembles more that of P. srhokai-i, es 2 )ecially 
the markings of the head. UjiiJer lij) and lower surface of head in the Wau s^iecimen, 
uniform white. A dark hrown band, seven scales wide, along the middle of the back, divided 
by a narrow yellow median line ; a black line on each side on the first row of scales. From 
here the brown colour of the sides clears u^) to yellowish at the outer margin of the dark 
dorsal band. A ferruginous brown longitudinal lino on each side of the ventrals and suh- 
caudals to the end of first half of tail. 
The four sjiecies of Psatiunophis found hitherto in the Egjqstian Sudan may be 
distinguished as follows : 
I. 
II. 
Scales in 15 rows 
,, 17 rows (exce 2 )tionally 19) 
1. Ui)i)er labials, nine 
2.eight 
a. Eostral, broader than deejj 
h. ,, as deejr as broad 
]'. hUeriatun, Peters. 
/’. schiikari, Forskal. 
J‘. stnlitcBniatna, Peters. 
/’. nihilans, Linnams. 
Psammophis 
Xajd. niip-ieolli.f, Reinhardt 
Plate XVIII., fig. 2 
A specimen from Taufikia, White Nile, 1270 mm. long (tail 200 mm.) Scales, 25, on the 
neck as well as on the middle of the body. Ventrals, 201 ; subcaudals, 55 i^airs ; u^iper 
labial, G to 7 ; jn-^oculars 2, postoculars 3, temporals 2 + 5. Head, light brown above ; body, 
greyish-olive ; ujrirer labials and lower surface of head, dark grey ; symijhysial and posterior 
chin-shields, whitish; the 17 anterior ventrals, black ; the following four, yellowish ; and, 
again, four and a half, black ; from here the yellow and black rings become indistinct 
and the ventrals become grey-olive with a light greenish-olive posterior margin. 
