120 NEW AND RARE BRITISH SPIDERS. 



red, furnished with hairs only ; on the tarsi, metatarsi, and tibiae 

 are a few very fine and erect hairs, the rest all oblique. I am not 

 sure, however, that these erect hairs are to be found on the tarsi 

 and metatarsi of the two hinder pairs. 



The f dices are rather small, straight, vertical, and a little 

 prominent near the middle in front. Along each side is a series of 

 transverse serrations, probably part of a stridulating apparatus, the 

 stridulations being effected by the scraping across these serrse of a 

 sharp corneous edge or point on the inner side of the base of the 

 humeral joints of the palpi. I am not aware that stridulations 

 have ever been heard by any observer in small spiders, made by an 

 apparatus of this kind, but, at any rate, such an apparatus is 

 plainly visible in the males of many species, and sounds might 

 easily be caused by its working which, though inaudible to human 

 ears, would be quite recognizable by appropriate faculties in the 

 female spider. Mr. F. M. Campbell, in " Journal " of the Linnean 

 Society, 1880, vol. xv., pp. 152-155, has a paper on this very 

 interesting subject. 



The palpi are rather long, similar in colour to the legs. The 

 cubital is much larger than the radial joint, of a very elongate-oval 

 form i.e., gradually lessening in size at the extremities. The 

 radial is broad, and its inner extremity is produced into a long, 

 tapering, curved, pointed apophysis, and with a group of strong 

 hairs at its outer extremity ; near together on the inside edge near 

 the base of the curve of the apophysis are two small black sharp 

 spines. The digital joints are rather large ; the palpal organs well 

 developed, complex, and with a black, filiform, tapering spine, 

 coiled in a circular form at their anterior extremity on the outer side. 



The abdomen is oval, of a sooty black hue, shining, and thinly 

 clothed with hairs. 



An adult male of this exceedingly rare spider was found under 

 a stone close to the shore at Whitenose, between Lulworth and 

 Weymouth, early in October, 1888, by F. O. P. Cambridge. It is 

 something like W. cucuUata (Wider), and, in fact, an example of 

 this last species was once mistaken for it by Dr. Thorell. 



