253 



is identical with X. horticola Ohl., according to specimens given 

 to me by Ohlert himself. X. pnlverulentus C. Koch, very briefly cha- 

 racterized in Uebers. d. Arachn. Syst., 1, p. 26, but never afterwards 

 specially mentioned by Koch, I also consider as a synonym to it: it is be- 

 yond all doubt that "X. pulverulentus" is the form , which C. Koch sub- 

 sequently, in Die Arachn., IV, described as a variety of A', horticola, and 

 declared to be = Ar. atomaria Panz. Moreover Thorn, versutus Blackw. 

 is, as I find from specimens with which Cambridge has kindly fur- 

 nished me, identical which this X. atomarius. Whether Walckenaer's ') 

 and Blackwall's 2 ) Thom. atomarius belong to either of the species 

 here in question, and, if so, to which, is more than I can venture 

 to decide; and the synonym Th, lynce.us Latr. 3 ) appears to me to be 

 equally doubtful. Together with the last mentioned species, Walcke- 

 naer and Blackwall under their Th. atomarius take up Th. similis 

 Eeuss 4 ) as synonymous; but as this species is stated to have three 

 pairs of spines on the under side of the fore tibiae, I do not venture 

 to refer it to either of the two species before us , in which these tibiae 

 only exhibit two pairs of spines on the under side. Neither do the 

 spiders called by Savigny and Audouin 5 ) "77*. Diana Walck. ?", and 

 which Walckenaer takes up as varieties of his Th. atomarius, appear 

 to me to belong to A", atomarius (Panz.) nob. 



X. atomarius (Panz.) nob., of which I have found a d 1 jun. in 

 Upland , and received fullgrown and young females from Skane through 

 Mr Eisen and from the Finnish Lappmark from Al. v. Nordmann, 

 is not so smooth and hairless as X. horticola C. Koch, (Westr.). 

 It has on the thighs of the first pair two, and on those of the second 

 and third pairs one short spine, even in the female, whereas the 

 female of X. horticola is destitute of spines on the thighs. In the 

 only full-grown male X. horticola, that I possess, the thighs of 



1838. Xysticus HORTICOLA C. Koch, Die Arachn., IV, p. 76 (ad part.:), 



Tab. CXXIX, fig. 299. 

 1853. Thomisus versutus Blackw., Descr. of some newly disc, spec, cet., 

 in Ann. and Mag. of Nat. Hist., 2 Ser.,XI, p. 15. 

 1864. „ „ id., Spid. of Gr. Brit., I, p. 83, PI. IV, fig. 49. 



1867. Xysticus horticola Ohl., Aran. d. Prov. Preuss., p. 118. 



1) Hist. Nat. d. Ins. Apt., I, p. 523. 



2) Spid. of Gr. Brit., I, p. 74, PI. IV, fig. 42. 



3) Gen. Crust, et Ins., I, p. 112. — Conf. Th. lynccus Leach, in The Edinb. 

 Cyclopedia, VH (Art. Crustaceology), p. 426. 



4) Zool. Misc., Arachn., p. 268 (274), PI. XVIU, fig. 8. 



5) Descr. de l'Egypte, 2e Ed., XXH, p. 399, PI. VII, figg. 1, 2. 



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