230 Dr. W. Rae Sherriffs on 



19. Argyrodes nigra (O. P.-Camb.)= Theridion nigrum 

 (O. P.-Camb.) = Theridion oxyurum (Thor.). 



A very small black spider with yellow legs, found without 

 any web on the back of a convolvulus-leaf ; very slow- 

 moving, with the tips of the abdomen upturned ; accompanied 

 on the same leaf by many small black ants which it 

 closely resembled. 



Locality. Nawalapitiya, Ceylon. 



Argyrodes nigra is not an Argyrodes, but a Theridion. 

 It is not a commensal like the others, both sexes of which 

 are found together on the same big web. 



Theridion (Walck.), 1805. 



Theridion is a large genus represented by the following 

 common species. 



20. Theridion mundulum (C. L. Koch) = T. am<£iium (Thor.). 



A very pretty little spider which I have found common on 

 the Nilgiris with its very irregular web, near the centre of 

 which is a withered leaf, below or within which the spider 

 shelters itself. 



Locality. Kotagiri, Nilgiris (6000 feet) ; Madras Beach. 



21. Theridion rufipes (Luc) 



is found indoors, sheltering in the corners of bath-rooms. 

 The pair are got together within the same small irregular 

 web. 



Locality. Nawalapitiya, Ceylon ; Kayencolam, Tra- 

 vancore. 



22. Theridion tepidariorum (C. L. Koch). 



Found within doors in corners of store-room, but also out- 

 side in the open. 



Locality. Nawalapitiya, Ceylon ; Kotagiri, Nilgiris ; 

 Madras city. 



These three species (T. mundulum, T. rufipes, and T. tepi- 

 dariorum) are noted by Simon as having almost a worldwide 

 distribution throughout the Tropics. 



Ariamnes (Thor.), 1869. 

 23. Ariamnes sp.? 



I possess two specimens of an Ariamnes from Madras. 

 One is a male and 4 mm. long. It may be A. gracillimus 



