There are only two labs in the US that perform the 25? measurement  
multivariate morphometric analysis for Africanization: USDA, ARS,  
Tucson and Florida Dept. of Agriculture, Gainesville.  Some states do  
a preliminary FABIS (Fast Africanized Bee Identification System):  
measure the length of forewings which is one of the strongest  
components of the more involved multivariate system.  If something is  
dubious based on forewing measurements, then it typically gets sent to  
the multivariate morphometric system.  Proficient (and patient)  
operators can pull and mount on slides the fore and hind wing, the  
posterior leg and a sternite from the abdomen of 10 workers in about  
an hour.  Digitizing all the points may take another half hour.

The "output" of the multivariate system is a discriminant score, with  
a probability value of matching one of the two reference populations.   
Very clearly African(ized) bees and European bees sort out well with  
high probabilities.  Colonies with intermediate scores are also  
matched to a probability by the program.  The interpretation that  
these probabilities indicate the degree of Africanization or  
Europeanization is not correct.  They are simply suggestive of  
admixture at some level, and failure of the program to assign them to  
one or the other population.

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