162 



the first word in his specific diagnosis, just as the word domesticus, 

 considered hy Lucas to be a specific name, is the last word of Li- 

 ster's diagnosis of Teg. Derhamii. Vid. above, p. 158. Heal spe- 

 cific names were first introduced into the science by Linn^us, 1751, 

 in his PMlosophia Botanica,.&n(L one cannot therefore, in adducing 

 authority for a specific name, or in deciding questions of priority, 

 go farther back than to 1751, the epoch of the creation of the now 

 exclusively adopted binominal system of nomenclature. (Conf. Thor., 

 On Eur. Spid., p. 7.) 



(Pag. 311.) VI. AGRCECA [= Agroeca Westr. 1861]. 

 Vid. Thor., On Eur. Spid., p. 135. 



(Pag. 313.) 1. A. liiiotina [= Agrmca brtmnea (Blackw.) 1833]. 



Syn.: 1833. AGELENA brunnea Blackw., Charact. etc., in Lond. and Edinb. 



Phil. Mag., 3 Ser., in, p. 351. 

 1843. Philoica linotina C. Koch, Die Arachn., X, p. 108, Taf. CCCL1V, 



fig. 826 (salt, ad part). 

 1861. AGELENA brunnea Blackw., Spid. of Gr. Brit., I, p. 159, PI. 



X, fig. 102. 



Mr Cambridge has kindly sent me a specimen of Agel. brunnea 

 Blackw., whereby I am assured of the identity of that species with 

 Agr. linotina Westr. — Both in Sweden and in Germany there are 

 two closely allied species of the genus Agrozca, which it is not 

 easy to distinguish: the one is Agr. brunnea, which Westring iden- 

 tifies with Philoica linotina C. Koch; the other, which has not yet 

 been specially mentioned, but which may possibly have been by C. 

 Koch confounded with A. brunnea under the denomination of Phi- 

 loica linotina, I call A. Haglundii ( = Philceca linotina Thor., Rec. Cl'it. 

 Aran., p. 109). A. brunnea is somewhat smaller than this latter: 

 the cephalothorax in $ is 2'/ 2 — 3 millim. long, tibia + patella of the 

 4 th pair of legs 3 — 3'/ 2 millim.; the vulva is composed of 3 small 

 fovea?, close to each other, forming an isosceles triangle, the apex of 

 which is directed backwards. In A. Haglundii % the cephalothorax 

 is about 3'/ 2 millim., the patella + tibia of the 4 th pair about 4 

 millim. long: the three foveae, which form the vulva, are somewhat 

 more distant from each other, and the posterior fovea is at a distance 

 from the two anterior greater than the interval betiveen the two latter, 

 and is united with them by a furroio bounded on both sides by a fine, 



