596 REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. [June 20, 



dinary marking ; the ground-colour of the abdomen deepens in its 

 hue on each side of this white stripe, becoming of the same colour as 

 the lateral stripes at its hinder extremity ; the underside is pale 

 buffish yellow, marked with two longitudinal brownish lines, which 

 converge a little towards each otber as they get near the spinners. 



An adult female differed only in being of a darker and more suf- 

 fused hue, the different lines and markings being not quite so 

 vivid. 



An adult example of each sex, with an immature female, were 

 found on the branches of the sont acacia, during the ascent of the 

 Nile, between Cairo and Manfaloot. 



Fam. Lycosides. 

 Nilus, gen. nov. 



Cephalothorax short, broad, and with very slight lateral constric- 

 tions at the caput. 



Eyes not very large nor very unequal in size, occupying the whole 

 width of the upperside of the caput, in two not very widely separated, 

 and almost equally curved, transverse rows ; the convexity of the 

 curves is directed forwards, but the front row is the shortest. 



Leys tolerably strong, not very long nor very unequal in length ; 

 their relative length 4, 1, 2, 3, or 1, 4, 2, 3 ; each tarsus ends with 

 three curved claws. 



Maxillae moderately long, straight, broader at their extremity than 

 at their base, and rather roundly truncated. 



Labium short, scarcely half the length of the maxillse ; lateral 

 margins slightly curved, and apex rounded, 



Abdomen short, oval, rather pointed behind, and projecting con- 

 siderably over the base of the cephalothorax. 



Nilus curtus, sp.n. (Plate LX. fig. 13.) 



Immature female, length rather more than 2 lines. 



The cephalothorax has a rather abrupt hinder slope, and the 

 profile-line of the caput and thorax to the hinder slope is level ; its 

 colour is yellow-brown, the ocular area, including a large somewhat 

 quadrate area behind it, being yellow, the quadrate area having two 

 indistinct brownish patches near its hinder part ; the clypeus is 

 yellow, with two brown patches opposite the middle of the base of 

 the falces, and its height scarcely equals half that of the facial 

 space ; on each side of the cephalothorax is a well-defined, straight, 

 yellow, but, not very broad stripe, reaching from the hinder extremity 

 quite to the insertion of the falces, and below it is a broad yellow- 

 brown marginal band. 



The eyes are seated, in the form of a crescent, on largish black tu- 

 berculate spots ; the lateral eyes of the hinder row are the largest, and 

 the fore laterals the smallest of the eight ; the interval between those 

 of the hind central pair is rather less than that between each and the 

 hind lateral on its side ; while the interval between those of the fore 

 central pair is rather greater than that between each and the fore 



