32 



91834. Zygia calophylla C. Koch, in Herr.-Schjeff. , Deutschl. Ins., 123 



{ad part.: 18, 19). 



1839. Zilla „ id. , Die Arachn., VI, p. 148, Taf. CCXVI, figg. 



538, 539. 



1844. Epeiba similis Blackw. , Descr. of some newly disc. spec, of Aran., 



in Ann. and Mag. of Nat. Hist., XIII, p. 186. 

 1858. Zilla x-notata Thor. , Om Clercks Origin. -spindelsaml., in Ofver- 



sigt af K. Vet.-Akad. Forhandl., XV, p. 146. 

 1864. Epeiba similes Blackw. , Spid. of Gr. Brit., II, p. 337, PI. XXV, fig. 244. 



In Rec. crit. , p. 25, I assumed, on grounds there stated, that 

 Ar. x-notatus Clerck was the same as Zilla montana Westr. , a view 

 which, when I subsequently had an opportunity of examining the 

 collection of spiders, which Clerck: had possessed and brought toge- 

 ther, I found to be erroneous. That collection in fact contained two 

 females of Z. calophylla (Walck.) C. Koch, but neither Z. atrica nor 

 Z. montana Westr., nor any other species to which it is possible 

 to refer Ar. x-notatus. This affords a so much better proof, that 

 it is Z. calophylla C. Koch , that Clerck has described under the 

 name of Ar. x-notatus, in as much as that he expressly says p. 46 , 

 that he had met with several females ("atskilliga honor") of that 

 species , and the description contains nothing whatever, that does not 

 apply to Z. calophylla (vid. Thor. , loc. cit.). I have accordingly as- 

 signed to that species the Clerckian name of x-notata, and have in 

 this been followed by Westring. 



The word "litera" in Ar. litera x notatus, Ar. liter a v notatus 

 etc. should not be considered as a part of the "nomen triviale" of the 

 animal: it is not found in the index of Clerck's work, as is seen 

 from our Synon. — Menge's Z. calophylla (Preuss. Spinn. , p. 76) does 

 not belong to this , but to the following species , Z. montana Westr. 

 (Z. Straemii n.) , which is evident, as well from its alleged smaller 

 size, as from the description and figures of its organs of copulation. 

 Z. x-notata (Clerck) is as large as Z. atrica, and its vulva is very 

 short and low, as in that species, not drawn out in the form of a 

 stiletto , as in Z. montana Westr. The male's clava also has not the 

 strong, curved spur observable in Z. montana Westr.- Concerning 

 that species and Z. montana C. Koch vid. infra. 



It is remarkable that Blackwall should not have observed that 

 his E similis is the same as Koch's Z. calophylla. — Mr. Cambridge 

 has kindly supplied me with English specimens of E. similis Blackw. 



