590 REV. O. P. CAMBRIDGE OX EGYPTIAN SPIDERS. [JuilC 20, 



tive sizes and position of the eyes and its much smaller size, but by 

 the speckled appearance of the abdomen, and the spots on the femora 

 of tbe first two pairs of legs ; the markings on the abdomen of S. 

 linncci being much larger and of a linear character ; the palpal 

 organs also, in that species, extend much nearer to the fore extremity 

 of the digital joint, besides being quite different in structure ; the 

 radial joint also is shorter in proportion to the cubital, and is armed 

 with two or three long and rather strong spines. 



Gen. Artamus, L. Koch (changed to Artanes by T. Thorell). 

 Artanes bigibba, sp. n. 



Immature female, length 2g lines. 



The cephalotlwrciM is of the ordinary form ; it is of a yellowish 

 grey colour, more or less completely mottled and suffused with 

 yellowish brown, generally leaving a not very distinct pale patch on 

 each side of the hinder part of the caput. 



The eyes are small and in the usual position ; those of the hind 

 central pair are further from each other than each is from the hind 

 lateral on its side ; and the relative position of the eyes of the front 

 row is similar ; both rows are curved, the convexity of the curve 

 directed forwards ; but the front row is much the shortest, and most 

 strongly curved. 



The legs are long and moderately strong ; their relative length 

 being 2, 4, 1,3; they are of a pale yellowish hue, more or less mottled 

 and suffused with white ; and the femora of the first pair are marked 

 rather underneath in front with a strongisb longitudinal stripe of 

 deep chocolate-brown (in some examples almost black) ; in some 

 examples the legs have an obscurely annulate appearance ; the tibiae 

 and metatarsi of the legs are furnished with longish spines. 



The palpi are similar in colour to the legs ; and the humeral 

 joints of those of the first pair have a large black spot underneath the 

 fore extremity. 



The falces are short, straight, vertical, subcorneal, of a whitish- 

 yellow colour, tipped with yellow-brown. 



The maxillae and labium are of the normal form, and, with the 

 sternum, of the same colour as the falces. 



The abdomen is of a somewhat subpentagonal form, truncate before, 

 and broadest towards the hinder extremity, which, however, is of a 

 somewhat pointed form ; at its broadest part on either side at the 

 margin is an obtuse gibbosity or protuberance, which, together with the 

 sides and the hinder part, has a wrinkled appearance after preservation 

 in spirit of wine ; the colour of the abdomen is greyish white mixed 

 with yellowish grey-brown, and in some examples with chocolate 

 red-brown, assuming an indistinct pattern of a longitudinal central line 

 on the fore half, which emits a short lateral oblique line from either 

 side near its middle, followed by two or three subangular transverse 

 lines, or chevrons. 



Four examples, all females and immature, were found among 

 herbage near Alexandria. 



