Volume s1-23, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Accidents caused by the bite of spiders of the genus have been known since olden times (22), being rather frequent in the United States, Chile, Colombia, Guatemala, Mexico, Uruguay and Argentina (); Australia and New Zealand (); Italy, Spain and Russia (); South Africa () and Madagascar (). In Argentina we have recorded hundreds of cases ().

Eight species of this genus have been described: (Cambridge, 1872); (Simon, 1889); (Rossi, 1770); (Koch, 1841); (Mello Leitao, 1940); (Cambridge, 1905); (Cambridge, 1905) and (Fabricius, 1775). and ought to be considered as fundamental species (11). The 12,000 spiders used in our investigations belonged to the species (Gerschman and Schiapelli). We also experimented with .


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  • Received : 14 May 1943

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