Requested reference
Levi, H. W. (1963c). American spiders of the genus Theridion (Araneae, Theridiidae). Bulletin of the Museum of Comparative Zoology 129: 481-589. 
-- Show included taxa
Levi, H. W. (1963c). American spiders of the genus Theridion (Araneae, Theridiidae). Bulletin of the Museum of Comparative Zoology 129: 481-589. -- Show included taxa