272 Mr. J. Blackwall on the Structure, Functions, (Economy, 



156. Neriene abnormis. 



Neriene abnormis, Blackw. Linn. Trans. yoI. xviii. p. G49. 

 Argus abnormis, Walck. Hist. Nat. des Insect. Apt. t. iv. p. 512. 



By the structure of its oral apparatus and by the disposition 

 and relative size of its eyes, this spider makes a near approxima- 

 tion to the Linyphics. It was taken under stones at Crumpsall 

 Hall in October 1836. 



157. Neriene mbripes. 



Neriene rubripes, Blackw. Lond. and Edinb. Phil. Mag. Third Series, 

 vol. viii. p. 485. 



My brother, Mr. Thomas Blackwall, found this species under 

 stones at Oakland in the autumn of 1834. 



158. Neriene dubia. 



Neriene dubia, Blackw. Linn. Trans, vol. xviii. p. 652. 



Argus dubius, Walck. Hist. Nat. des Insect. Apt. t. iv. p. 513. 



The male of Neriene dubia, which has much resemblance to 

 the Theridia in external structure, was captured on iron rails at 

 Crumpsall Hall in October 1836. I have placed it, provisionally, 

 in the genus Neriene, till the female shall be discovered, as the 

 sexes of the same spider frequently differ in the relative length 

 of the legs and in the form of the maxillse. 



Genus Walckenaera, Blackw. 

 159. Walckenaera acuminata. 



Walckenaera acuminata, Blackw. Lond. and Edinb. Phil. Mag. 



Third Series, vol. hi. p. 106 ; Research, in Zool. p. 315. pi. 2. 



fig. 3-6. 

 Micryphantes camelinus, Koch, Die Arachn. B. hi. p. 11. tab. 76. 



fig. 163, 169. 



Both sexes of this curiously constructed spider were taken by 

 Mr. Thomas Blackwall in October 1832 under stones and on 

 rails in the township of Crumpsall. I have since met with it in 

 Denbighshire, and in the spring of 1849 I received specimens of 

 the female from Mr. J. Hardy, who took them in Berwickshire. 



In autumn the female deposits between 20 and 30 spherical 

 eggs of a yellow colour, not agglutinated together, in a plano- 

 convex cocoon composed of fine white silk of a looseish texture, 

 measuring y ^-ths of an inch in diameter ; it is attached by the 

 plane surface to the under side of stones and fragments of rock, 

 and its form is frequently modified by irregularities on the sur- 

 face of the body to which it adheres. 



M. Walckenaer entertains the opinion that his Argus cornutus 



