5th flagellomere. Scanning electron micrographs of flagellomere 5 from An. gambiae s.s. (A) and An. quadriannulatus (B) adult female antennae. (A) Length (L) and width (W) are measured as described in Materials and Methods. (B) Representative image showing the various sensilla types that are found on most flagellomeres: lch – large chaetica, sch – small chaetica, st – sharp trichoid, bt – blunt trichoid, lco – large coeloconic, gp – grooved peg, E – similar to type E trichoid. Note that the scale bars are different for each image.