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



dull green colour with whitish tufts. The eggs deposited in dif- 

 ferent cocoons vary greatly in number ; but I have never noticed 

 fewer than 60 nor more than 214 in a single set ; they are sphe- 

 rical, of a pale yellow colour, and are agglutinated together in a 

 subglobose mass. 



Tribe Senoculina. 



Family DysderidcB, 



Genus Dysdeea, Latr. 



202. Dysdera erythrina. 



Dysdera erythrina^ Walck. Hist. Nat. des Insect. Apt. t. i. p. 261 ; 

 Latr. Gen. Crust, et Insect, tom. i. p. 90 ; Hahn, Die Arachn. 

 B. i. p. 7. tab. 1. fig. 3 ; Koch, Uebers. des Arachn. Syst. erstes 

 Heft, p. 20; Die Arachn. B. v. p. 7^. tab. 165. fig. 389 ; Blackw. 

 Linn. Trans, vol. xix. p. 128. 



Specimens of Dysdera erythrina have been taken under stones 

 in the central parts of the city of Manchester ; others have been 

 transmitted to me from Cambridge by Professor Potter and 

 Mr. Alfred Bishop, and from Oxford by Mr. W. H. Baxter ; and 

 Mr. Walker informs me that he has met with this spider on the 

 south coast, near the seashore. 



203. Dysdera rubicunda, 



Dysdera rubicunday Koch, Die Arachn. B. v. p. 79. tab. 165. fig. 390, 

 391 ; Blackw. Linn. Trans, vol. xix. p. 129. 



The only individual of this species which has come under my 

 observation was an adult male, contained in a collection of spi- 

 ders sent to me from Cambridge by Charles C. Babington, Esq., 

 M.A. M. Walckenaer is certainly mistaken in supposing that 

 Dysdera rubicunda is merely a variety of Dysdera erythrina (Hist. 

 Nat. des Insect. Apt. t. ii. p. 444), as well-marked differences in 

 the structure of the palpal organs of the males prove to demon- 

 stration that they are distinct. 



204. Dysdera Hombergii. 



Dysdera Hombergii, Walck. Hist. Nat. des Insect. Apt. t. i. p. 263 ; 



Blackw. Linn. Trans, vol. xix. p. 129 ; Koch, Die Arachn. B. x. 



p. 95. tab. 351. fig. 819, 820. 

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



vol.i. p. 190. 



gracilis, Wider, Museum Senckenb. B. i. p. 200. taf. 14. fig. 1. 



punctata, Koch, Die Arachn. B. v. p. 84. tab. 167. fig.395, 396. 



Distinguished arachnologists have mistaken Dysdera Horn- 



