>..a certain El-Sarrag tested crosses with Apis mellifera jemenitica
(which occurs naturally south of the Sahara but north of the range of
scutellata and adansonsii).

I wonder what has prevented the scuts from taking over all the ranges south of the Sahara.  The have certainly push out the EHBs in the Americas (except in the temperate zones).

Waldemar

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