298 
Psyche 
[December 
Because more work needs to be done on individual, as well as 
geographical, variation of the several species of South American 
Latrodectus, no attempt was made at this time to determine the names 
of species Nos. 1, 2, 3, and 4 from Santiago del Estero, Argentina. 
Literature Cited 
Abalos, J. W. 
1962. The egg sac in the identification of species of Latrodectus. Psyche 
69: 268-270. 
Abalos, J. W. and E. C. Baez. 
1967. The spider genus Latrodectus in Santiago del Estero, Argentina. 
Animal Toxins, Pergamon Press, Oxford, pp. 59-74. 
DeBiasi, P. 
1962. Estrutra interna e presenca de segmentos de embolo no epigino 
de Latrodectus geometricus. Papeis Avulsos, Sao Paulo 15: 
327-331. 
Gerschman de Pikelin, B. S. & D. E. Schiapelli. 
1965. El genero Latrodectus Walckenaer, 1805, en La Argentina. Rev. 
Soc. Entomol. Argentina 27: 51-59. 
Levi, H. W. 
1959. The spider genus Latrodectus. Trans. Amer. Micros. Soc. 78: 
7-43. 
1965. Techniques for the study of spider genitalia. Psyche 72: 152-158. 
Levi, H. W. & L. R. Levi. 
1962. The genera of the spider family Theridiidae. Bull. Mus. Comp. 
Zool. 127(1) : 1-71. 
McCrone, J. D. & H. W. Levi. 
1964. North American Widow spiders of the Latrodectus curacaviensis 
group. Psyche 71: 12-27. 
1966. Postembryological development of spiderlings from two Peruvian 
Latrodectus populations. Psyche 69: 268-270. 
