82 



1841. Theridium lunatum C. Koch , Die Arachn., VIII, p.7 1, Taf . CCLXXIH, 



fig. 645. 



1851. „ formosum Westu., Fortecin. etc., p. 39. 

 1856. Steatoda lunata Thor., Eec. crit., p. 28. 



1864. Theridium sisyphum Blackw., Spid. of Gr. Brit., II, p. 179, PI. 



xm, fig. ii3. 



1866. Steatoda lunata Menge, Preuss. Spinn., I, p. 150, PI. 28, tab. 63. 



Araneus lunatus Clerck belongs in my opinion, as certainly 

 as A. formosus Clerck, to this well-known species. In my Eec. crit. 

 (loc. cit.), where I have given my reasons for that opinion, I have 

 also mentioned the causes, why I have preferred the specific name 

 lunatus to formosus. As however Westring does not acknowledge 

 A. lunatus as certainly synonymous with A. formosus, but rather 

 with Th. tepidariorum C. Koch, and also Sundevall has described 

 the last named spider under the name' of Th. lunatum (Clerck) , it 

 is perhaps best with Westring to adopt the, at least among Swedish 

 arachnologists , unquestioned specific name formosum , whereby at any 

 rate nobody's right of priority is violated. — Walckenaer (Ins. Apt., 

 II, p. 299), C. Koch and Blackwall (loc. cit.) have erroneously placed 

 Sundevall's liter, lunatum among the synonyms of this instead of the 

 preceding species. C.Koch's Tlier. pallidum, which Walckenaer has 

 also referred to this species, is identical with TAnypMa frenata Reuss 

 (see that species above, p. 54), which by its maxillae somewhat in- 

 clined to the labium approaches the genus Theridium. — Th. for- 

 mosum Blackw. 1837 ') is identical with Titer, pulchellum Walck. 



This and the preceding species, which I had, in Bee. crit., 

 with Sundevall referred to the genus Steatoda, may be better assigned 

 to Theridium sensu strictiori. — According to Blackwall, Th. for- 

 mosum (Clerck) is met with in North America (Canada) 2 ). 



(Pag. 159.) 5. Th. saxatile [= Theridium riparium Blackw. 1834]. 



Syn.: 1834. Theridium riparium Blackw., Kesearches in Zool., p. 354 (sec. 



Blackw., Spid. of Gr. Brit.). 

 1834. ,, „ id., Charact. of some undescr. spec, of Aran., 



in Lond. and Edinb. Phil. Mag., 3 Ser., V, p. 51. 



1) Charact. of a new genus and some undescr. species of Aran., in Lond. and 

 Edinb. Phil. Mag., 3 Ser., X, p. 101. 



2) Notice of Spiders captured by Potter in Canada, in Ann. and Mag. of 

 Nat. Hist., XVII, p. 77. 



