Hi all
I think there is a misunderstanding about the role of hemolymph in varroa parasitization. Ramsey may have showed that varroa prefer fat bodies to plain hemolymph, but the fact is that varroa consume the hemolymph when they parasitize bees. 

The mite feeds by breaking through
the bee’s cuticle with its stylet and then sucking up hemolymph
(Kanbar and Engels 2003; Evans 2006). Kanbar and
Engels (2003) demonstrated that V. destructor is able to create
and maintain open wounds in the honey bee cuticle and repeatedly
feeds upon the same open wounds over a long period
of time, suggesting that the normal healing of the wounds is in
some way retarded by the mite.

Varroa destructor parasitism reduces hemocyte concentrations and prophenol oxidase gene expression in bees from two populations. Original Paper First Online: 12 February 2018.  https://doi.org/10.1007/s00436-018-5796-8

PLB

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