and Systematic Arrangement of British Spiders. 273 



(Hist. Nat. des Insect. Apt. t. ii. p. 367), and the Theridion cor- 

 nutum of M. Wider (Museum Senckenbergianum, B. i. p. 235. 

 taf. 16. fig. 2) are the same as the Micryphantes aamelinus of M. 

 Koch, which is identical with Walckena'era acuminata ; but they 

 differ from it, apparently, both in structure and colour ; and I 

 have already shown (Annals and Mag. of Nat. Hist. Second 

 Series, vol. ix. p. 17) that the Linyphia alticeps of Prof. Sun- 

 devall, included by M. Walckenaer among the synonyma of this 

 species, is perfectly distinct from it. 



160. Walchenaera cus^ndata. 



Walckena'era cuspidata, Blackw. Lend, and Edinb. Phil. Mag. Third 

 Series, vol. iii. p. 108 ; Research, in Zool. p. 320. pi. 2. fig. 11. 



This rare spider is found under stones and on rails in the 

 south of Lancashire, in Yorkshire, and in Denbighshire, and two 

 females, one adult and the other immature, were transmitted to 

 me from Berwickshire by Mr. J. Hardy in the spring of 1849. 



The Theridion monoceros of M. Wider is nearly allied to this 

 species, but it presents several points of difference both in struc- 

 ture and colour (Museum Senckenbergianum, B. i. p. 236. 

 taf. 16. fig. 3). 



161. Walckena'era Hardii. 



Walckena'era Hardii, Blackw. Annals and Mag. Nat. Hist. Second 

 Series, vol. vi. p. 340. 



I am indebted to Mr. J. Hardy for an adult male of this species, 

 which was sent to me from Berwickshire with other specimens of 

 Araneidea in December 1848. It is nearly allied to fTalckenaera 

 cuspidata. 



162. Walckena'era obtusa. 



Walckena'era ohtusa, Blackw. Lond. and Edinb. Phil. Mag. Third 

 Series, vol. viii. p. 482. 



A few males of Walckena'era obtusa, in a state of maturity, 

 were discovered under stones at Oakland in February 1835. 

 Between the male of this species and the male of Walckena'era 

 cuspidata there is a striking resemblance ; but the smaller size 

 of the latter, the comparative shortness of its sternum, differences 

 in the structure of its palpi, and especially the acute conical pro- 

 minence situated within the trapezoid formed by the four inter- 

 mediate eyes, effectually serve to distinguish it from the former. 



1 63 . Walckena'era fuscipes. 



Walckena'era fuscipes, Blackw. Lond. and Edinb. Phil. Mag. Third 

 Series, vol. viii. p. 481. 



Adult males of this species were found under stones at Oakland 

 in March 1835. 



