341 



C. Koch's synonym, Troch. umbraticola , may seem uncertain, 

 for he does not mention that the paler band on the back of the ce- 

 phalothorax is forked in front, and there encloses a pale middle 

 stripe, as is the case both in P. piscatorius and P piraticus, though 

 that band is not so conspicuous in the former as in the latter spe- 

 cies; neither does he mention the double row of snow-white points 

 on the hinder part of the back of the abdomen in P. piscatorius. 

 C. Koch had however seen only one specimen of his TV. umbrati- 

 cola, the figure of which in other respects agrees very well with 

 P. piscatorius. — Large and dark specimens of this spider bear a 

 certain resemblance in colour and habitus to Dolom.fimbriatus Clerck. 



By its short legs and low forehead, P. piscatorius stands on the 

 line of transition to the genus Trochosa, to which it is referred by 

 C. Koch. The position of the eyes appears to me however not to 

 differ from that of P. piraticus 9 » and, as the species in its colours, 

 in the form of the vulva and in its habits assimilates to P. piraticus, 

 I conceive that I ought to aggregate it to the genus. Pirata. Clerck 

 captured it "running on the surface of the water", in company with P. 

 piraticus (vid. loc. cit ), and I have myself found it on the shores of 

 a lake in Westergotland. Most of the specimens that I have seen, 

 had been captured at the lake Ringsjon in Skane. 



Regarding L. piscatoria Blackw. and L. (Potamia) piscatoria 

 C. Koch, see the next species. 



(Pag. 532.) 31. L. piratica [= Pirata piraticus (Clerck) 1757J. 



Syn.: 1757. Araneus piraticus Clerck, Sv. Spindl., p. 102, PI. 5, tab. 4. 

 1777. Aranea palustris Fabr., Spec. Ins., I, p. 542. 

 1789. „ PIRATICA Oliv., Encycl. Meth., IV, p. 218. 

 1802. Lycosa „ Walck., Tabl. d. Aran., p. 14. 

 1831. „ „ Hahn, Die Arachn. , I, p. 107, Tab. XXVII, fig. 80. 



91835. „ PALUSTRIS C. Koch, in Herr.-Sch^ff. , Deutschl. Ins-, 



131, 13 (sec. Walck., Ins. Apt.). 

 1848. „ (Potamia) piratica id., Die Arachn., XV, p. 1, Tab. 



DV, figg. 1413, 1414. 

 1856. Potamia piratica Thor., Rec. crit. Aran., p. 63. 

 1870. Pirata piraticus id., On Eur. Spid., p. 193. 



Walckenaer, Sundevall and Hahn erroneously cite Ar. pisca- 

 torius Clerck (the preceding species) under Lyc. piratica. Of the sy- 

 nonyms taken up by C. Koch under his L. (Pot.) piratica, Ar. pa- 

 lustris Linn, does not belong to it; neither in all probability does 



44 



