neiv and rare British Spiders. 203 



The eyes are at the extremity of the caput. The fore-cen- 

 trals describe a square whose posterior side is longer than the 

 rest. The position of the fore-central and lateral pairs is 

 rather difficult to make out, owing to their indistinctness ; 

 but the interval between the eyes of the former considerably 

 exceeds a diameter. 



Legs moderately long, slender, yellow. 



Palpi short ; digital joint and palpal organs very large, the 

 rest very slender. The cubital joint ie very short; the radial 

 stronger and considerably produced in front, in a somewhat 

 curved form, over the base of the digital joint, pointing out- 

 wards, its extremity being deeply cleft, or bifid ; the posterior 

 portion of the bifid part is prominent and tipped with a small 

 reddish-brown point, the anterior portion is obtuse, and ad- 

 heres more closely to the digital joint. The palpal organs are 

 complex, but tolerably compact ; and at their extremity is a 

 very small, fine, brown spine, curved in a circular form, but 

 almost concealed in a membranous substance. 



Abdomen black and glossy. 



A single example was received in 1878 from Mr. T. Work- 

 man of Belfast, by whom it was found near that city, and kindly 

 sent to me among some other spiders taken in the same locality. 

 Subsequently (May 15, 1879) an adult and immature males 

 were found at Bloxworth, under some bricks in the Kectory 

 yard. In the form and structure of the palpi and palpal 

 organs this spider bears much general resemblance to Walc- 

 kenaera erythropus, Westr. (Cambr. i Spiders of Dorset,' 

 p. 165) ; but the entire absence of any elevation on the caput 

 distinguishes it at a glance from that species. The portion of 

 structure also, in the palpus of that spider, corresponding to the 

 posterior part of the bifid extremity of the radial apophysis in 

 the present species, emerges very distinctly from beneath the 

 joint, while in the present spider it appears to form part of the 

 tipperside of it. 



Walclcenaera minutissima, sp. n. (PI. XII. fig. 7.) 



Adult female length | line (-^V of an inch) . 



The cephalothorax, legs, palpi, falces, maxilla?, labium, and 

 sternum of this exceedingly minute spider are of a not very 

 deep brown colour, the genual joints of the legs being much 

 paler than the rest. 



The abdomen is large, of a globular form, and projects 

 greatly over the thorax, its colour being of a dull olive-green 

 strongly suffused with a sooty hue, and its surface thinly 

 clothed with short hairs. 



In its general form this little spider is very like Walchena- 



