529 



scarcely noticeable black spot at the very base, and with the ex- 

 treme edge of the apex black. In the Spanish specimen almost the 

 whole belly is occupied by one large, black field, which stretches 

 itself, by a narrower, short addition to its length, as far as the mamil- 

 lse (just as in Walckesaer's figure of the female in H. N. d. Ins. Apt., 

 loc. cit ). On the sides of the black field the belly is orange-yellow. 

 In the African specimen the short continuation of the black field to 

 the mamillse is wanting, so that the black colour does not reach 

 those organs: the belly is in this specimen similar to that in C. 

 Koch's figure of "L. prwgrandis" in Die Arachn., V, fig. 414. 

 (Neither, according to him, does the black field in his "L. narbonnen- 

 sis" extend as far as the mamillae). Dufour describes and figures the 

 colour of the belly in his specimens from Spain just such as it is 

 in my specimen from Oran; according to him the thighs have on the 

 under side a large black spot at the base, and a small similar spot 

 at the apex, much as, according to C. Koch's figure above-men- 

 tioned, it appears to be in "/,. prcegrandis" . All this shows, that 

 the colour both of the belly and of the under side of the thighs some- 

 what varies. The vulva is in T. narbonmsis much smaller than in 

 T. fascii-ventris, not broader than the diameter of a tarsus, reddish 

 brown, with two narrow, longitudinal furrows, which are pointed in 

 front and separated by a low, flat septum, the whole almost forming 

 a narrow M; in one of my specimens (the Spanish) the septum is 

 somewhat dilated and depressed in the posterior extremity, in the 

 other it is of more uniform breadth. 



(Pag. 509.) Arctosa liguriensis. 



Tarentula liguriensis (Walck.) 1837. 



Syn.: 1837. Lycosa tarentdloides liguriensis Walck., Ins. Apt., I, p. 288. 

 ?1845. „ biimpressa Luc, Explor. de 1' Alger., Anim. Artie, I, p. 



107, PI. 2, fig. 6. 



1871. Tarentula liguriensis Sim., Aran. nouv. ou peu connus du midi 



de l'Eur. , in Mem. de la Soc. roy. d. Sc. 

 de Liege, 1870, p. 83. 



This spider is more nearly allied to e. g. T. fabrilis and T. ra- 

 diata (fametica) than to the genuine Tarantulse (T. fascii-ventris, 

 T. narbonensis, T. tarentidina etc.), from which it differs in having 

 the anterior row of eyes but slightly curved forwards , the pale la- 

 teral bands of the cephalothorax not deeply and undulatingly toothed 



