Abstract
Altogether 9815 measurements were made on the head and its parts in 269 haploid and 295 diploid drones, 109 queens, 248 and workers. All individuals originated from 12 queens of Apis mellifera ligustica, A. m. adansonii, their backcrosses and some hybrids. The head, and all its parts and appendages measured, were larger in diploid drones than in haploid drones. But relationships with the same characters in queens and workers were different; some diploid drone characters were super-male, others were intersex, and others were caste characters.

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