271 



is darker than the sides of the hack of the abdomen, and is bisected 

 by a fine pale line, which extends from the termination of the lancet- 

 like black spot towards the anus. The sides of the cephalothorax 

 have, at least in the female, a broader pale lateral border; in the 

 broad, pale central band one may observe a long, dark, more or 

 less conspicuous, backward-pointing, wedge-formed spot, extending 

 from the posterior eyes to the hinder declivity of the pars thoracica. 

 The tibial joint of the palpus in cf has, at its apex, on the outer 

 side, a process directed outwards, curved somewhat upwards, dilated 

 at the extremity, and there broadly and obliquely truncated. The vulva 

 consists of an area scarcely longer than it is broad, and bounded by 

 • two (-formed costse gently curving towards each other. 



A cT jun. of Th. arenarius I have captured here in Upland. 

 Dr L. Koch has had the kindness to present me with a cf and 9 

 ad. from Nuremberg of this species. 



(Pag. 46?.; Fam. V. LYCOSID^E [= Citigradse Latr., n.]. 



Vid. Thoe., On Europ. Spid., p. 187. 



(Pag. 468.) I. LYCOSA [= Lycosa (Latr.) 1804 + Tarentula 



(Sund.) 1833 + Troc/tosa (C. Koch; 1848 

 + Pirata Sund. 1833]. 



Vid. Thor., op. cit., p. 189—193. 



The genus Lycosa Latr.,Westr. is without question, among all 

 larger groups of spiders, that, of which the synonyms are most dif- 

 ficult to disentangle. This is partly the result of the species being 

 very like each other, and really difficult to distinguish ; but the prin- 

 cipal cause is no doubt to be looked for in the circumstance, that 

 many authors have, in their descriptions, not understood how to make 

 use of any other marks of distinction than such as are drawn from 

 the colour, and have not seen the necessity of attending to many less 

 conspicuous, but so much the more constant differences of form, such 

 as small peculiarities in the relative size and position of the eyes^ 

 the length and breadth of the cephalothorax compared with certain 

 joints of the legs, the spine-armature of the legs etc. A third source 

 of difficulty lies in the careless and misleading manner, in which 



