Requested reference
Levi, H. W. (1963c). American spiders of the genus Theridion (Araneae, Theridiidae). Bulletin of the Museum of Comparative Zoology 129(10): 481-592, 13 pls. 
-- Show included taxa
Levi, H. W. (1963c). American spiders of the genus Theridion (Araneae, Theridiidae). Bulletin of the Museum of Comparative Zoology 129(10): 481-592, 13 pls. -- Show included taxa