# FABIS Manual Fast Africanized Bee Identification System – Table 1

Table 1 – Formula for calculating the functions for 2 or 3 characteristics and probability table for 8 measurements and functions.
Measurement (a) Value of Measurement Probability Sample is Africanized PA (b)
Forewing Length 8.968
8.991
9.001
0.99
0.95
0.90
Fresh Weight 0.4639
0.4707
0.4737
0.99
0.95
0.90
Dry Weight 0.1503
0.1532
0.1545
0.99
0.95
0.90

Function
(a)
Value of Function PA
-104.422 + (8.541 X Forewing Length) + (10.413 X Femur Length) -0.560
-0.320
-0.212
0.99
0.95
0.90
-84.298 + (8.012 X Forewing Length) +
(24.78413 X Femur Length)
-0.576
-0.354
-0.254
0.99
0.95
0.90
-94.050 + (9.744 X Forewing Length) + (38.670 X Femur Length) -0.580
-0.334
-0.226
0.99
0.95
0.90
-89.415 + (6.601 X Forewing Length) + (7.235 X Femur Length) + (22.381 X Fresh Weight) -0.532
-0.316
-0.220
0.99
0.95
0.90
-99.41 + (7.571 X Forewing Length) + (9.6833 X Femur Length) + (34.047 X Dry Weight) -0.521
-0.299
-0.195
0.99
0.95
0.90

 (a) Forewing length is the average measurement for 10 bees, in mm;Femur length is the average measurement for 10 bees, in mm; Fresh weight is the average weight for three groups of 10 bees each, in grams; Dry weight is the average weight for three groups of 10 bees each, in grams. (b) The probability a sample is European (PE) = 1-PA.