and Systematic Arrangement of British Spiders. 465 



Males of this species, with the palpal organs fully developed, 

 were taken in July 1836 on rails near Llanrwst. 



172. Walckenaera parva. 



Walckenaera parva, Blackw. Linn. Trans, vol. xviii. p. 635. 

 Argus parvus, Walck. Hist. Nat. des Insect. Apt. t. iv. p. 508. 



In December 1836 and January 1837 this minute spider was 

 seen in considerable numbers on rails near Llanrwst. 



173. Walckenaera depressa. 



Walckenaera depressa, Blackw. Lond. and Edinb. Phil. Mag. Third 

 Series, vol. viii. p. 482. 



Adult males of Walckenaera depressa were detected under stones 

 in a wood at Oakland in Apx-il 1835, and in June 1837 both 

 sexes were procured in the same locality. 



174. Walckenaera humilis. 



Walckenaera humilis, Blackw. Linn. Trans, vol. xviii. p. 636. 

 Argus humilis, Walck. Hist. Nat. des Insect. Apt. t. iv. p. 506. 



Several specimens of this spider were found in October 1836 

 under slates in the garden belonging to Thomas Warner, Esq., 

 of Crumpsall Green, near Manchester; others were observed 

 afterwards on rails at Crumpsall Hall ; and in 1 840 Miss Ellen 

 Clayton met with males and females of this species near Garstang 

 in Lancashire. 



175. Walckenaera cristata. 



Walckenaera cristata, Blackw. Lond. and Edinb. Phil. Mag. Third 

 Series, vol. iii. p. 107 ; Research, in Zool. p. 317. pi. 2. 

 fig. 7-10. 



Theridion bicorne, Wider, Mus. Senck. B. i. p. 220. taf. 14. fig. 12. 



Micryphantes ccespitum, Koch, Uebers. des Arachn. Syst. erstes 

 Heft, p. 12; Die Arachn. B. viii. p. 104. tab. 281. fig. 673, 674. 



Argus bicornis, Walck. Hist. Nat. des Insect. Apt. t. ii. p. 365. 



Mr. Thomas Blackwall discovered this species in October 1832 

 under stones and on rails in the neighbourhood of Manchester, 

 and I have since met with it in similar situations near Llanrwst ; 

 it has also been taken near Bradford in Yorkshire by Mr. R. H. 

 Meade. 



176. Walckenaera antica. 



Theridion anticum, Wider, Mus. Senck. B. i. p. 221. taf. 15. fig. 1. 

 Micryphantes tibialis, Koch, Die Arachn. B. iii. p. 47. tab. 89. 



fig. 203, & viii. p. 107. tab. 282. fig. 675. 

 Walckenaera apicata, Blackw. Linn. Trans, vol. xviii. p. 637. 

 Argus antievs, Walck. Hist. Nat. des Insect. Apt. t. ii. p. 357. 

 np>cat»*, Walck. Hist. Nat. des Insect. Apt. t. iv. p. 509. 



