310 



Although Clerck's figures of his Ar. fabrUis and Ar. inqnilinns 

 are so good, that it is difficult to understand how these two species 

 could be confounded with each other, there are nevertheless few of 

 Clerc'ks spiders, which have been so greatly mistaken by non-Swe- 

 dish arachnologists, and the synonyms of which it is so difficult to 

 ascertain. — First as regards Walckenaer, judging from the toler- 

 ably detailed description in the Faune Franc., it seems to me prob- 

 able, though far from certain, that his L. fabrilis is the same as 

 the Ar. (Lye. or Tar.) fabrilis of Clerck and the later Swedish 

 arachnologists; it is there stated of the marking on the back of the 

 abdomen : "pres du corselet, ce sont deux triangles re'unis, qui forment 

 un polygone allonge, retre'ei dans son milieu." The expression "hordes 

 de jaune" as applied to the triangles which form this polygon, does 

 however not suit Tar. fabrilis (Clerck): the reddish colour on the 

 (wretched) figure that accompanies the description, seems even ra- 

 ther to indicate T. inquilina (Clerck) than T. fabrilis. But on the 

 other hand the marking on the back of the abdomen — and I think 

 it is on this that most stress must be laid — agrees better with 

 T. fabrilis; and I have also received from Simon a cT ad. of this last 

 species from the neighbourhood of Paris under the name of Lyc. 

 fabrilis Walck. — Walckenaer's statement (H. N. d. Ins. Apt., I, 

 p. 307), that the anterior row of eyes is curved backwards, in a di- 

 rection opposite to that in the large, true Tarantulse, is equally 

 erroneous for T. fabrilis and T. inquilina. 



C. Koch's Lyc. (Tar.) fabrilis is the same as Ar. inquilinus 

 Clerck (L. inquilina C. Koch is quite another species, and identical 

 with L. andrenivora Walck., Black w., or L. barbipes Sund. : vid. infr. 

 under L. barbipes Westr.). It is nevertheless probable, that C. 

 Koch had also seen specimens of the right T. fabrilis and confounded 

 it with T. inquilina (Clerck): one is at least led to suspect this 

 from his taking up as a synonym "L. melanogaster Hahn," which 

 is clearly identical with T. fabrilis (Clerck). In T. inquilina in 

 fact the upper part of the abdomen never has a sharply-defined ) 

 spear-formed black area in front, such as appears on Hahn's figure 

 of L. melanogaster; such an area on the contrary is always conspi- 

 cuous in T. fabrilis, as also in the female of the spider called by 

 C. Koch L. inquilina. The marking on the back of the abdomen is 

 nearly the same in both these last-mentioned species, and pretty 

 much such as Koch has represented it in fig. 1388, loc. cit. : it is 

 however much purer black and white in L. fabrilis, which more- 



