16 Mr. J. Black wall on the Structure, Functions, (Economy, 



to Linyphia cauta, were discovered in the greenhouse and melon- 

 pits belonging to Mrs. Darbishire, of Green Heys, near Man- 

 chester, in September 1836. 



In the account of Linyphia vivax given in the eighteenth vo- 

 lume of the ' Transactions of the Linnsean Society/ a doubt is 

 implied as to its being distinct from the Linyphia globosa of M. 

 Wider (Museum Senckenbergianum, B. i. p. 259. taf. 17. fig. 9) ; 

 however, having attentively perused the description and inspected 

 the figure of the latter, I am now thoroughly convinced that they 

 are different species. 



110. Linyphia socialis. 



Linyphia socialis, Sund. Vet. Acad. Handl. 1832, p. 160. 



annulipes, Blackw. Lond. and Edinb. Phil. Mag. Third Series, 



vol. iii. p. 318 ; Research, in Zool. p. 398. 



I concur entirely in the opinion communicated to me by Pro- 

 fessor Sundevall (private letter), that Linyphia socialis and Liny- 

 phia annulipes are identical ; the former name therefore, imposed 

 upon this species by the Professor, must take precedence of the 

 latter. 



This spider, which occurs in autumn on the trunks of trees in 

 woods at Oakland, M. Walckenaer has portrayed in his ( Hist. 

 Nat. des Insect. Apt/ pi. 21. fig. F. 2 D, under the name of The- 

 ridion gonjie; fyit has prefixed to his description of it, t. ii. p. 274, 

 the appellation of Linyphia bucculenta, conferred by Professor 

 Sundevall on a very different species ; namely on that designated 

 Linyphia reticulata by M. Walckenaer (Vet. Acad. Handl. 1831, 

 p. 109). 



111. Linyphia cripticolens. 



Linyphia cripticolens,W&\ck. Hist. Nat. des Insect. Apt. t. ii. p. 275. 



. ■ nebulosa, Sund. Vet. Acad. Handl. 1829, p. 218. 



pallidula, Blackw. Research, in Zool. p. 403. 



When my attention was first directed to this spider in the 

 summer of 1834, I perceived that it possessed the essential cha- 

 racters of a Linyphia, and described it in my ' Researches in 

 Zoology' as new to science, under the specific name of pallidula, 

 not being aware that M. Walckenaer had included it among the 

 Theridia, in his 'Tableau des Araneides/ p. 75, or that Professor 

 Sundevall had described it previously, having, at that time, no 

 opportunity of consulting his excellent publications in this de- 

 partment of zoology. 



Linyphia cripticolens is found in North Wales under stones, 

 and in cellars, vaults, and other obscure damp places. In June 

 or July the female constructs a globular cocoon of yellowish 

 brown silk of a loose texture, measuring ^th of an inch in dia- 



