1876.] REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. 543 



Algeria, inasmuch as, from the nature of their geographical ami 

 physical conditions, the faunas of Egypt and Algeria must have very 

 much in common ; my collection, however, of Algerian Spiders is too 

 scanty for this purpose, and I have not been able to get access to 

 any others. So far as I can make out with tolerable certainty, about 

 eighteen species only of the following list appear to be identical with 

 species found in Algeria. The determination, however, of closely 

 allied species by means of descriptions and figures alone is very un- 

 certain work ; and thus I have in many cases hesitated to determine, 

 from these alone, their synonymic identity. And so, again, in some 

 instances I may perhaps have described as new, species already de- 

 scribed by M. Lucas in his great Algerian work ; but this, of the two, 

 appears to me a less evil than that of including, as synonymic, 

 species not certainly identified as similar. 



A list is added to this paper of those Egyptian Spiders, so far as I 

 have been able to ascertain them, not found by myself, but described 

 and recorded by other authors. This considerably swells the number 

 of known species, but adds nothing to the numbers of indigenous 

 families and genera contained in my own list. Thus the total 

 number of Egyptian Araneidea known to the present time appears 

 to be 226. 



Out of the 164 species found by myself, 29 are identical with 

 species described and figured by Savigny and Audouin, and the 

 numbers (of species of all genera) common to Egypt and Palestine 

 are 48. 



Order ARANEIDEA. 

 Family Fieistatides. 

 Genus Filistata (Latr.). 

 Fj list at a testacea. 



Filistata testacea, Latr. Considerations, p. 12; Cours d'Ento- 

 mologie, p. 512. 



F. attaiica, Koch, Die Arachn. v. p. 6, pi. 146. fig. 343 ; Cambr. 

 Spid. Palest. & Syria, P. Z. S. 18/2, p. 216. 



Adult females and a single adult male of this species were found 

 in crevices of the bark of palm and other trees, and in the interstices 

 of old walls, near Alexandria and in several other parts of Egypt. 



The Spider recorded P. Z. S. I. c. is, I think, of the same species 

 as the one here noticed. At the time of drawing up the list of 

 Palestine Spiders I had some doubts on this point ; but at present 

 I consider them to be identical with each other, as well as with 

 F. attaiica, Koch, and F. testacea, Latr. F. bicolora, Walck., is 

 also probably identical with these. 



The calamistrum on the metatarsi of the fourth pair of legs differs 

 from that of other Spiders possessing it, both in extent and position. 

 In the present species it consists of a few strong curved spine-like 

 bristles in a longitudinal series, situated on a sharpish ridge, a little 

 depressed, close to the hinder extremity on the inner side of the 

 joint. The inframammillary organ, although present, is not easily 



66* 



