I am currently examining the southern extent of Africanized honey bees in Argentina. The literature seems to define a zone of saturation which exists. The outer fringe of this zone corresponds with an isoline representing a mean high July temperature (coldest month south of Equator) of 16 C degrees (60 F degrees). The litureture that I have seen is a few years old. Are the Africanized honey bees found any further south? Also, are there any indications that the vegetation (desert and desert shrub) of southern Argentina has limited southern spread? Are there any other factors involved in limiting the spread of Africanized honey bees? Any comments would Bee appreciated. Thanks Robert Burke Southwest Texas State BITNET"RB02817@SWTEXAS"