Mr. J. Blackwall on newly discovered species of Araneidea. 235 



brown colour, the falces, maxillae and lip having a faint tinge of 

 red. The palpi resemble the legs in colour; the cubital and 

 radial joints are short, the latter, which is the stronger, being 

 somewhat produced at its extremity, in front ; the digital joint is 

 oval, with a small, conical process at its base, and a lobe near 

 the middle of the outer side ; it is convex and hairy externally, 

 concave within, comprising the palpal organs, which are highly 

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

 scalelike process at the base, on the outer side, and are of a 

 brownish-red colour. The abdomen is oviform, convex above, 

 projecting over the base of the cephalo-thorax ; it is thinly 

 clothed with hairs, glossy, and of a dark yellowish -brown colour, 

 the branchial opercula and spinners being much the palest. 



This spider, which was found on Ingleborough, a mountain 

 in Yorkshire, in September 1855, was received from Mr. R. 

 H. Meade, 



Genus Walckenaera, Blackw. 



Walckena'era vafra. 



Length of the male y\jth of an inch ; length of the cephalo- 

 thorax y^^ ; breadth -^^ ; breadth of the abdomen ^V y length of a 

 posterior leg ^^^ ; length of a leg of the third pair /q. 



The cephalo-thorax is oval, convex, glossy, with a strong, ver- 

 tical prominence before, which is somewhat compressed on the 

 sides and surmounted by a few hairs : the falces are small, 

 conical, armed with teeth on the inner surface, and inclined 

 towards the sternum, which is broad, glossy, and heart-shaped : 

 the maxillae are powerful and curved towards the lip, which is 

 semicircular and prominent at the apex. These parts are of a 

 brownish-red colour, with the exception of the anterior pro- 

 minence of the cephalo-thorax, which has a dark brown hue 

 tinged with red. The legs are long, slender, hairy, and have a 

 bright yellowish-red tint; the fourth pair is the longest, then 

 the first, and the third pair is the shortest ; each tarsus is termi- 

 nated by three claws ; the two superior ones are curved and pec- 

 tinated, and the inferior one is inflected near its base. The 

 palpi resemble the legs in colour, but the radial and digital 

 joints are tinged with brown ; the cubital joint is clavate ; the 

 radial joint projects two apophyses from its extremity ; one, on 

 the inner side, is large, pointed, curved outwards in front of the 

 digital joint, and has, near its base, a minute process on the 

 convex side, and a large obtuse one on the opposite side ; the 

 other apophysis, which is smaller and obtuse, is situated under- 

 neath ; the digital joint is somewhat oval, convex and hairy ex- 

 ternally, concave within, comprising the palpal organs ; these 

 organs are highly developed, complicated in structure, with two 

 long, filiform, contiguous black spines enveloped in membrane. 



