Abstract
Braula coeca has been reported repeatedly, but incorrectly, to have only a single spermatheca—an extremely rare condition in the higher flies. This error is based on the misinterpretation of the ventral receptacle as a single spermatheca combined with the failure to detect the two present but largely reduced dorsal spermathecae. This misconception is of importance, e. g., for correct character coding in phylogenetic analyses and in the context of studies regarding recurrent trends in the evolution of the spermathecae and the ventral receptacle. The ventral receptacle of B. coeca is described and illustrated in detail together with other aspects of the female reproductive tract.
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