Fine structure of the antennal sensory hairs in female Anopheles stephensi

The fine structure of the sensory hairs on the antennal flagellum of female Anopheles stephensi was studied by electron microscopy. The antennal hairs were divided into at least five different types, on the basis of hair diameter, hair wall thickness, communicating channel density, and dendritic branching in the hair lumen. Regardless of different types, however, all hairs, presumed to be olfactory receptors, were found to be innervated by two sensory cells.