345 



stripes, but without perceptible rings. The tibiae of the 1 st pair, 

 which are somewhat coarser than the others are dark and blackish, 

 and the spines on their under side very long: the first pair of these 

 spines reach with ther apices at least a far as the middle of the next 

 pair. The vulva is composed of two oblong, almost parallel, widely 

 separated foveae near the rima genitalis, outwards and behind bor- 

 dered by a paler costa: from this costa a little tooth appears to 

 project into the outer side of the fovea; both foveae are situated on 

 a large brown, horny area. — P. uliginoms is easily distinguished 

 from P. latitans (Blackw.) 1841 ') or Lye. (Poiarhia) palustris G. Koch 

 1848 2 ) by the cephalothorax having, as in all the Pirata-speties 

 mentioned in the preceding pages, a paler middle-band forked in 

 front and enclosing in the fore part, within the fork, a pale central 

 stripe: in P. latitans the fore or forked portion of the band is wan- 

 ting, or at least is only visible when the animal is immersed in 

 fluid, and the pale middle stripe in front is altogether absent; whereas, 

 when the animal lies in spirit, a broad triangular darker spot is 

 perceptible just where the forked band, if there were one, would begin 

 to divide, and in front of that spot a fine dark line bordered by 

 two paler stripes This is at least the case in a $ and a % ad. 

 from England, which Cambridge had the kindness to send me. The 

 cephalothorax is in P latitans $ 2, in 5 2 1 , millira. long some- 

 what shorter than patella + tibia the of 4 th pair, its breadth being equal 

 to the length cf the tibia of that pair. The sternum is of a dark 

 yellowish brown colour, without any paler middle line. The legs 

 are distinctly dark-annulated in j; in cf the rings are less di- 

 stinct and the patellae and tibiae af the 1 st pair are somewhat dark. 

 The vulva is formed by a little, bright, raised, brown area at the 

 edge of the rima genitalis, divided by a longitudinal middle-furrow 

 into two inversely oviform tubercles. The tibial joint of the pal- 

 pus in J is double as long as it is broad, something longer than 

 the patellar joint; the lamina is tolerably broad, broader than the 



1) The differ, in the numb, of eyes etc., in Transact, of the Linn. Soc, XVIII, 

 p. 612; Spid. of Gr. Brit., I, p. 33, PI. II, fig. 15. 



2) Die Arachn., XV, p. 4, Tab. DV,tigg. 1415, 1416. - As C. Koch probably 

 gave to this spider the name palustris under the idea, that it was, at least <«1 par- 

 tem, identical with Ar. palustris Linn., which is by no means the case (L. pa- 

 lustris C. Koch has not hitherto been found in Sweden), there is no reason to 

 preserve that name, even if it be this species, that C. Koch described in 1835, 

 in Herr.-Schjeff., Deutschl. Ins., 131, 13, under the name of L. palustris. 



