1964] 
McCrone and Levi — Latrodectus 
27 
Venoms 
The results of a toxicological study of differences between the 
venoms of L. mactans, L. variolas and L. bishopi , and those of L. 
mactans tredecimguttatus from Israel and L. geometricus, will be 
published elsewhere (McCrone). 
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