2 



show the different denominations under which each species had bee:i 

 described, together with their origin and date; I have however 

 always cited the above-mentioned works of Westring and Black- 

 wall, occasionally also some other book in which the species under 

 notice had been particularly well figured or described, or which for 

 some other reason appeared to me to deserve especial reference. Names 

 taken from mere catalogues of species I have admitted only in the 

 few cases, in which I could with certainty identify the species intended. 



In the case of every species I have , immediately after its name 

 in the author under review, placed within brackets [] the name 

 which I look upon as the proper name of the species, together with 

 the date of the year, to which the specific name belongs. Also after 

 every generic name I have placed within brackets the corresponding 

 name acknowledged by me, and I have indicated the year from 

 which it dates. The name of the "authority" or writer, who first 

 imposed the specific name, stands in parentheses, when in his works 

 the species bears another generic name: in other cases it is with- 

 out parentheses; in the cases of generic names, parentheses enclosing 

 the authority indicate, tbat in the (latest) work of the author cited 

 the compass of the genus is different from that here received. A t 

 before a synonym indicates that the specific name, as having been 

 previously used within the genus , or rendered inappropriate for some 

 other reason, is to be changed for another, more recent denomination. — 

 For everything else regarding the plan and arrangement of the present 

 treatise, I beg leave to refer to my former work: On European spiders, 

 p. 1—38. 



Of the greatest part of the species described by Westking , I have 

 had the opportunity of examining specimens determined by himself: 

 the few that I have not myself seen , are marked with a *, as is also 

 the case with all other species here treated of, that are known to 

 me by figures or descriptions only. Many interesting Swedish spiders 

 have been communicated to me by Prof. C. Stal, Dr. C. J. E. Haglund 

 and other friends, as will be found stated in various places in the 

 following pages. Of the spiders described by Blackwall, the Kev. 0, 

 P. Cambridge, of Bloxworth, Dorsetshire, has kindly sent me nume- 

 rous species, all with certainty identified. 



Not only are my especial thanks in the first place due to Mr. 

 Westring and the Bev. Mr Cambridge for the assistance they have 

 thus kindly given me, but I have the pleasure to acknowledge many 

 and valuable communications from Prof. Alex. v. Nordmann of Hel- 

 singfors, D:r L. Koch of Niirnberg, Prof. A. Menge of Danzig, Prof. 



