Requested reference
McCrone, J. D. & Levi, H. W. (1964). North American widow spiders of the Latrodectus curacaviensis group (Araneae: Theridiidae). Psyche, Cambridge 71(1): 12-27. doi:10.1155/1964/86469 
-- Show included taxa
McCrone, J. D. & Levi, H. W. (1964). North American widow spiders of the Latrodectus curacaviensis group (Araneae: Theridiidae). Psyche, Cambridge 71(1): 12-27. doi:10.1155/1964/86469 -- Show included taxa