340 Mr. J. Blackwall on some new species ' 



extremity, on the outer side, and inclined towards the lip, which 

 is semicircular and prominent at the apex : sternum heart-shaped, 

 broad, convex and glossy. These parts are of a very dark reddish 

 brown colour. Eyes disposed on the anterior part of the cephalo- 

 thorax; the four intermediate ones describe a trapezoid whose 

 anterior side is the shortest, and those of each lateral pair are 

 seated obliquely on a tubercle, and are contiguous ; the anterior 

 eyes of the trapezoid are the smallest of the eight. Legs mode- 

 rately long, provided with hairs ; the fourth pair is the longest, 

 then the first, and the third pair is the shortest ; they are of a 

 reddish brown colour, the femora being the reddest. Each tarsus 

 is terminated by three claws ; the two superior ones are curved 

 and slightly pectinated, and the inferior one is inflected near its 

 base. The palpi resemble the legs in colour, but are rather paler ; 

 the humeral joint is somewhat curved towards the cephalo-thorax ; 

 the cubital joint is clavate, and the radial, which is short, has 

 two curved, pointed, black apophyses at its extremity, in front, 

 the superior one being the larger and more prominent ; the 

 digital joint is oval, convex and hairy externally, concave within, 

 comprising the palpal organs, which are moderately developed, 

 complicated in structure, and of a reddish brown colour. The 

 abdomen is oviform, sparingly clad with hairs, convex above, 

 projecting over the base of the cephalo-thorax, and is of a 

 brownish black colour. The branchial opercula are brown. 



A male of this species, having the palpal organs completely 

 developed, was found on a rail at Oakland in February 1850. 



Genus Walchenaera, Blackw. 

 5. Walckenaera Hardii. 



Length of the male ^th of an inch ; length of the cephalo- 

 thorax y'^ ; breadth -jg ; breadth of the abdomen y^g ; length of 

 an anterior leg y ; length of a leg of the third pair j-. 



This species, which is nearly allied to Walckenaera cuspidata, 

 has the cephalo-thorax oval, convex, glossy, prominent before, 

 with an obtuse conical protuberance situated in the space sur- 

 rounded by the eyes, a little in advance of the posterior pair, 

 immediately behind which is a small tuft of hair : falces power- 

 ful, conical, divergent at the extremities, armed with teeth on 

 the inner surface, and inclined towards the sternum, which is 

 heart-shaped : maxillae moderately strong, obliquely truncated at 

 the extremity, on the outer side, and inclined towards the lip, 

 which is semicircular and prominent at the apex : legs provided 

 with hairs; the anterior and posterior pairs, which are the 

 longest, are equal in length, and the third pair is the shortest. 

 These parts are red-brown, the lip being much the darkest, and 



