75 



(Pag. 144.) III. PACHYGNATHA [= Pachygnatha Sund. 1823]. 

 Vid. Thor., On Eur Spid., p. 77. 



(Pag. 144.) 1. P. Clerckii [= Pachygnatha Clerckii Sund. 1823]. 



Syn.: 1823. Pachygnatha Clergioi Sund., Specimen acadera. Gen. Aran. Suec. 



exhibens, p. 16. 



182.. Theridium maxillosum H.\ns, Monogr. Aran., 4, PI. 4, fig. B. 

 1833. Manduculus ambiguus Blackw., Charact. of some undescr. gen. etc., 



in Lond. and Edinb. Phil. Mag., 3 Ser., Ill, p. 111. 

 1837. Pachygnatha Listeei C. Koch, Uebers. d. Arachn.-Syst., 1, p. 10. 

 1841. Linyphia maxillosa Walck., H. N. d. Ins. Apt., II. p. 268 (saltern 



ad partem). 



1841. „ Clerckii id., ibid,, p. 270. 



1864. Pachygnatha Clerckii Blackw. Spid. of Gr. Brit., IT, p. 318, PI. 



XXII, fig. 233. 



1867. „ „ Merge, Preuss. Spinn., I, p.95,P1.16,tab.28. 



The intangled synonymism of this and the following species 

 has been excellently unravelled both by Blackwall and Westring. 

 Of the synonyms taken up by Walckenaer (loc. cit. , II , p. 268 ; IV, 

 pp. 483, 484) under the head of Linyphia maxillosa and L. Clerckii, 

 only Hahn's Ther. maxillosum and Koch's Pack. Listeri really belong 

 to this species. Koch's P. Clerckii is certainly an imperfectly deve- 

 loped form of P. DeGeeri, as Westring supposes; P. Clerckii Ohl., 

 of which Ohlert kindly sent me a specimen (a cf jun.) appears to 

 be the young of the genuine P. Listeri. — Sundevall's specific name 

 is undoubtedly prior to Hahn's, which dates from the latter end of 

 the third decennium of the present century. 



The Aranea maxillosa of Fabricius (Ent. Syst., II, p. 411) is the 

 same species as Desis dysderoides Walck. 1 ), according to Schiodte 2 ), 

 who has examined the typical specimen of Ar. maxillosa Fabr. 



(Pag. 146.) 2. P. Listeri [= Pachygnatha Listeri Sund. 1830]. 



Syn.: 1830. Pachygnatha Listeri Surd., Sv. Spindl. Beskr., in Vet.-Akad. Handl. 



f. 1829, p. 210. 



1) Hist. Nat. d. Ins. Apt., I, p. 610. 



2) Bidrag til den underjordiske Fauna (Det Kongelige Danske Videnskabernes 

 Selskabs Skrifter, Naturvid. og Mathem. Afd., 1851, Bd II), p. 21. 



