Mr. Blackwall's Desci'iptions of new Species of Spiders. 637 



and maxillae being the brownest. Legs and palpi red- brown. First and 

 fourth pairs of legs, which are the longest, equal in length, third pair the 

 shortest. Abdomen oviform, thinly covered with hairs, convex above, 

 projecting over the base of the cephalo-thorax ; it is brownish black. 

 Plates of the spiracles very dark brown. 



The male is rather darker than the female, and the anterior part of the 

 cephalo-thorax, which is elevated and truncated, has numerous short hairs 

 on its summit. On this summit, also, the eyes are distributed in pairs ; 

 one pair, situated on its posterior part, forms with another, on its anterior 

 margin, an elongated trapezoid, whose front side is considerably the short- 

 est ; the two other pairs are disposed on the lateral margins, the eyes con- 

 stituting each being contiguous ; the anterior eyes of the trapezoid are 

 much the smallest of the eight. The sexes differ, likewise,. in the relative 

 length of their legs, the posterior ones of the male, which measure xtth 

 of an inch, exceeding the anterior ones a little in longitudinal extent. 

 The palpi are dark-coloured ; the second joint is clavate, and has a small, 

 pointed apophysis on the inner side, at the base ; third and fourth joints 

 moderately long ; the latter projects a large apophysis from its anterior 

 extremity, which curves outwards and rather upwards in front of the fifth 

 joint ; it is somewhat enlarged at its termination, and has a pointed pro- 

 cess on the outer side ; a small, obtuse apophysis occurs, also, on the 

 under side of the fourth joint ; the fifth joint is oval, convex and hairy 

 externally, concave within, comprising the palpal organs, which are highly 

 developed, complicated in structure, very prominent, with a strong, curved, 

 black spine at the superior part, and a fine, convoluted one on the outer 

 side, near the extremity, resembling in form the human ear, contiguous 

 to which, on the under side, is a slightly curved, pointed, projecting pro- 

 cess. The colour of these organs is red-brown. 



Specimens of Walchenaera humilis were discovered in October 1836, under 

 slates, in the garden belonging to T. Warner, Esq., of Crumpsall Green, near 

 Manchester ; and others were observed afterwards on rails at Crumpsall 

 Hall. ; 



24. Walchenaera apicata. Nigricans ; maxillis rufescenti-brunneis ; pedibus 



4 o 2 



