Interesting, can you cite a reference? 
 
In Central America pseudoscorpions (per obs) around the hives are "a dime a 
dozen".  They prey on bees and you often find bees, mostly dead and mostly 
workers, being held, and sucked dry, by a pseudoscorpion backed into a crevice 
on the hive.  BTW, some/most of the pseudoscorpions down there are more than a "tad" bigger 
than their typical North American counterparts.  There are a number of other bee hive 
predators that have moved over from the stingless bees found there, including a 
fascinating hemipteran bee mimic.  Maybe they prey on more than just the bees? 
 
Varroa are not a problem in Central American Africanized Honey Bees but yet they 
seem to have more of a problem with Varroa further north.  Maybe they lost one 
of the factors in their "resistance" to Varroa, when they left the range of those 
particular pseudoscorpions, etc. behind? 
 
Food for thought. 
 
Rip

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