G7 



which bears on its posterior side, towards the apex, a fine, somewhat 

 clublike process or obtuse spine directed downwards and slightly curved 

 forwards. As for the male's organs of copulation , see Menge's figures, 

 loc. cit. The tibial joint of the palpus has, as Westring observes, 

 a stronger bristle on its anterior side. The hook-like accessory la- 

 mina (das Nebenschiffchen: Menge) shows on its side, nearer the base, 

 a strong tooth, and often (perhaps always?) another, more slender, 

 nearer the apex, which teeth are not seen in Menge's figures. 



Tiieridium pygmceum Sund. (Vet.-Akad. Handl. f. 1829, p. 121) 

 should not to be quoted under this species. The diagnosis and the 

 description of the abdomen and legs of the female of Th. pygmceum 

 evidently belong to Singa trifasciata C. Koch {Epeira Herii Blackw.), 

 as Westring ha« already observed, and that species is also found in 

 Sundevall's collection under the name of Th. pygmceum (see Westr., 

 Aran, suec, p. 127). From what further is said of the female, as 

 also of the male of Th. pygmceum, it is not possible to see what 

 species then was intended, only that it was some other than Singa 

 trifasciata, and probably a Linyphia. Sundevall himself says later 

 (Vet.-Akad. Handl. f. 1832, p. 252), that Th. pygmceum belongs to 

 the genus Erigone, to which he assigns those species of his old genus 

 Linyphia, which are "nigricantes, pedibus rufis, parvi, agiles, man- 

 dibulis in plerisque ovatis, femore crassioribus, apice attenuatis et 

 divergentibus:" but these characteristics do not suit L. pygmcea 

 Westr. The only ground for assuming, that it is this species that 

 Sundevall confounded with Singa trifasciata, is the circumstance that 

 specimens of L. pygmcea Westr. are found in Sundevall's collection 

 together with specimens of Singa trifasciata under the name of liter, 

 pygmceum. These specimens have probably been placed in the col- 

 lection subsequently to the composition of the description. But even 

 supposing that Sundevall did make use of these specimens while 

 making his description of Th. pygmceum, it is still undeniable, that 

 that description can only with the utmost uncertainty be referred 

 to Westring's TAn. pygmcea; and when two different species are 

 found preserved in a collection of types, one of which can with per- 

 fect certainty be recognized by the description, whereas the other is 

 doubtful, it is surely to the former, and not to the latter, that the 

 specific name is to be preserved. Accordingly, in the case before 

 US, it is not Lin. pygmcea Westr. (L. tenebricola Reuss), but Si?iga 

 trifasciata C. Koch, that is entitled to the specific name pygmcea 

 Sund. — See also above, p. 26: Singa Herii Westr. 



