1876-3 REV. O. P. CAMBRIDGE ON EGYPTIAN SPIDERS. 601 



and radial joints, and the larger size (especially the greater width) 

 of the digital joint ; and the palpal organs are different in their 

 structure. The legs also are far less distinctly annulated, and are 

 quite destitute of the long erect hairs so conspicuous in T. pilipes. 



Two adult males and an adult female were found in the neighbour- 

 hood of Cairo. 



Trochosa urbana, sp. n. (PI. LX. fig. 14.) 



Lycosa agretyca, Savigny, Egypte, p. 147, pi. iv. fig. 6. 



This Spider, although nearly allied to Trochosa (Lycosa) agretyca 

 (Walek. & Blackw.), is quite distinct from that species, and is in 

 fact still more nearly allied to L. campestris (W. & B.). From the 

 former the distinctly marked bright yellow colour of the normal 

 macula on the fore half of the abdomen, as well as its pointed hinder 

 extremity, will distinguish it at a glance ; while from the latter, with 

 which it agrees in size, and which it resembles greatly in appearance, 

 it may easily be separated by the character of the central longitudinal 

 yellow band on the cephalothorax. This in T. campestris is broad, 

 tapering towards its hinder extremity, strongly constricted at the 

 hinder part of the caput, and its fore part marked with two longitu- 

 dinal parallel brown lines ; whereas in T. urbana the central band is 

 narrow and of uniform width from the hinder slope to the middle of 

 the ocular area, having a pale yellowish longitudinal line on each 

 side of its fore part near the eyes. Also, in all the examples found, 

 the digital joint of the male is pale-coloured instead of being of a 

 deep reddish brown as in L. campestris. The palpal organs of the 

 male also differ in structure. 



Adult and immature examples of both sexes were not infrequent 

 among low plants and other herbage in a marsh near Alexandria. 



Trochosa effera. 



Lycosa effera, Cambr. Spid. Palest. & Syr., P. Z. S. 1872, p. 318. 



An adult male and female were found in the neighbourhood of 

 Cairo, differing from the Palestine specimens only in size, the 

 Egyptian examples being the largest. The adult male measures 

 5| lines in length, and the female 7 lines. An immature female was 

 also found near Alexandria. 



Gen. Tarentula, Sund. 



Tarentula tarentulina. 



Lycosa tarentulina, Savigny, Egypte, p. 143, pi. iv. fig. 2. 



Immature examples (of the female only) were found in abundance 

 near Alexandria, in their cylindrical holes on waste and desert places ; 

 the hoary-grey ground colour, and the black underside of the 

 abdomen distinguish this Spider from all others of the family found 

 by myself in Egypt. 



Tarentula truculenta, sp. n. 



Female immature, length rather over 5 lines. 



This Spider is very nearly allied in colours and general appearance 



