Requested reference
Levi, H. W. & Randolph, D. E. (1975). A key and checklist of American spiders of the family Theridiidae north of Mexico (Araneae). Journal of Arachnology 3: 31-51. 
-- Show included taxa
Levi, H. W. & Randolph, D. E. (1975). A key and checklist of American spiders of the family Theridiidae north of Mexico (Araneae). Journal of Arachnology 3: 31-51. -- Show included taxa