56G REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. [June 20, 



The palpi are large, similar in colour to the legs, strong and tumid, 

 especially the radial joint, which is of a somewhat globular form. 

 The digital joint is considerably produced at its fore extremity (the 

 produced portion being dark yellowish brown), and terminating with 

 an irregular corneous process. The palpal organs are globular, with 

 a strong corneous process issuing from them and directed backwards ; 

 this process is of a dark red-brown colour mixed with black, of a 

 somewhat twisted form, and very obtuse at its extremity. 



The maxilla are of the usual form, pale yellow at their base and 

 dark brown at their fore part, the extreme point being whitish. 



The labium, is also dark brown, but pale whitish at its apex. 



The stei-num is dark brown, marked obscurely with some still 

 darker radiating lines. 



The abdomen is of moderate length, very convex above, gradually 

 and considerably elevated backwards and, in a slightly produced 

 form, at its hinder extremity, giving it a subtriangular shape when 

 looked at in profile ; this elevation is much stronger in the female 

 than in the male ; it is of a dull luteous colour ; the fore half of the 

 upperside has an indistinct elongate central longitudinal marking, 

 sometimes pretty distinctly defined by a fine blackish marginal line; 

 this marking is broadest in the middle, where it has an angular 

 point and short oblique line running from it backwards on each side, 

 with a similar point and line on either side of its obtuse termination; 

 following this are two or three duplex angular blackish bars, or 

 chevrons, continued by some fine linear spots and markings towards 

 the spinners ; and on either side of the highest point of the abdomen 

 are two or three blackish irregular spots. The different examples vary 

 in the number, extent, and regularity of these markings ; in some 

 specimens most of them are obsolete or nearly so. A broad black 

 and red-brown band occupies the central longitudinal line of the 

 underside, but is usually interrupted a little way from the spinners. 



The female resembles the male in colours and markings ; but her 

 abdomen, as above observed, is more strongly elevated behind, and 

 its markings are generally better-defined ; the genital aperture is a 

 large transverse slit in a strongly but gradually elevated epigyne. 



The form of the abdomen, which approaches but is not nearly so 

 produced as that of P. caudatus (Duf.), will readily distinguish this 

 species. 



I met with it pretty frequently among the ruins of the ancient 

 temples in various parts of Egypt above Cairo, but principally in 

 those above Thebes. It is very nearly allied to, but appears to be 

 quite distinct from, Pholcus lyoni, Bl., found in the Calcutta Pre- 

 sidency of India, and which I have myself also received from Bom- 

 bay (sent to me by Major Julian Hobson) as well as from Calcutta, 

 sent to me by C. Curtoys, Esq. 



Pholcus rivulatus. 



Pholcus rivulatus, Saw Egypte, pi. iii. fig. 12. 



? Pholcus nivalis, Blackw. Ann. & Mag. N. H. (3) vol. i. p. 432. 



Adult and immature examples of both sexes of this Spider were 



