ON NEW AND RARE BRITISH ARACHNIDS. 125 



I do not as yet consider at all certain, and it remains for 

 further research to confirm it. The normal form of 

 Theridion simile probably occurs on heaths in the same 

 district, but I have never as yet taken it so far from its 

 usual habitat, i.e., the heather-clad waste lands. 



Phyllonethis instabilis, Cambr. ; PI. A,, figs. 7, 8. 



Theridion instabile, Cambr. ; Trans. Linn. Soc. 



XXVII., p. 416, pi. 55, No. 14. 

 Phyllonethis instabilis, Cambr. ; Spid. Dors., p. 95. 

 Theridion venustum, Walck. -Cambr. ; Spid. Dors., 

 p. 476. Dr. A. R. Jackson, Proceedings Roy. 

 Phys. Soc., Edinburgh, Vol. XIX., No. 5, 

 pp. 122, 123, PL II., figs. 8, 10, 12, 13. 

 It appears on further consideration that the above, 

 formerly considered to be of the same species as Theridion 

 venustum, Walckenaer, is not that species, nor yet the 

 Theridion lepidum, Walck., with which, also, it was 

 considered conspecific ; the original name, therefore, 

 given to it (Cambr., Trans. Linn. Soc., I.e. above) 

 becomes again valid. 



Phyllonethis bellicosa, Sim. ; PI. A, figs. 9, 10, 11. 



Theridium lepidum, Walck. -Sim. ; Arachn. de 



France V., p. 64. 

 Theridium bellicosum, Sim. ; Aran nouv, &c., 



2e Mem., p. 106, in Mem. Soc. Roy. Sc. Liege 



and Arach. de France V., p. 64, as syn. of 



T. lepidum, Walck., note 3. 

 Theridium bellicosum, Sim. ; Dr. A. R. Jackson, 



Proceedings Roy. Phys. Soc., Edinburgh, 



Vol. XIX., No. 5, p. 121, and pp. 123, 124, 



PL II., figs. 7, 9, 11, and 14. 

 Theridion lepidum, Walck. -Cambr. ; Annals of 



Scottish Natural History, pp. 220, 223, October, 



1905, sub. Phyllonethis. 



