Mr. Blackwall's Descriptions of new Species of Spiders. 607 



employed to curl certain lines proceeding from the spinners, observed to con- 

 stitute the most remarkable character in the web of every spider comprised in 

 this family, those supplied by the inferior pair being wrought into a delicate 

 inflected band, which chiefly imparts to the snare its most important property, 

 namely, that of adhesion*. 



Crevices in rocks and walls, and the foliage of trees and shrubs, are the 

 favourite haunts of the Cinijlomdce, which, by their general organization and 

 habits, should immediately follow the Drassidce in the systematic arrange- 

 ment of the Araneidea. 



Gen. CiNiFLO. 



Oculi in seriebus 2 transversis ; serie posteriori posticfe convexa ; seriei ante- 

 rioris et brevioris oculi intermedii recti, supra marginem frontalem positi, 

 paul5 majores ; utriusque laterales in tuberculis positi. Maxillce fortes, 

 ad apicem dilatatse rotundatse paul6que labium versus declinatse. La- 

 bium paul5 longius quam latum, medio dilatatum, apice truncatum. 

 Pedes robusti; pari Inio longissimo, dein 4to (in ? ), 3tio brevissimo. 

 Tarsi triunguiculati ; unguibus 2 superioribus curvatis pectinatis, inferiore 

 prope basin inflexo. 



Ciniflo atrox. {Clubiona atrox, Latr. Gen. Crust, et Insect, t. 1. p. 93. Walck. 

 Hist. Nat. des Insect. Apt. t. 1. p. 605. Amaurohius atrox, Koch, Uebers. 

 des Arachn. Syst. p. 15.) 



This is the only spider at present ascertained to belong to the genus Ciniflo ; 

 though, from what is stated by M. Walckenaer relative to the appearance of 

 the web of Clubiona ferox, Faune Frangaise, Aran^ides, p. 152, it scarcely 

 admits of a doubt that this species also is provided with eight spinners and 

 with calamistra ; to assign it a place, however, among the Ciniflonidce before 

 this point has been determined by observation would be premature. 



I may remark, that the relative length of the legs is different in the sexes of 

 Ciniflo atrox, the second pair being rather longer than the fourth in the male. 



* For a description of the calamistrum and of the manner in which it is employed by the Ciniflonidce 

 in the fabrication of their webs, and for an account of the discovery of the fourth pair of spinners in 

 spiders belonging to this family, see the Transactions of the Linnean Society, vol. xvi. p. 473, et seq., 

 and vol. xviii. p. 223. 



