Fig. 3. Methylene Blue preparations of the right side tympanal scolopidia viewed from the dorsal chamber in two species of Drepanidae. Median is on the left. (A) Drepana arcuata. Composite image created from two micrographs taken at different focal planes. Sensory cell bodies of scolopidia 1-4 are marked, as well as the axons of cells 2 and 3 (arrowheads), and the location of the dendrite (d) and scolopale cell (arrow) of scolopidium 4. Scale bar, 0.05 mm. Inset: Scolopale rods and cap (c) and distal dendrite (d) of scolopidium 4. Scale bar, 0.005 mm. (B) Watsonalla uncinula. Scolopidia 1-4, marking the attachment cell (AC) and the location of the scolopale rods (arrow) of scolopidium 3. Scale bar, 0.05 mm. Inset: Scolopale cap (c) and distal fibrils (F) of the attachment cell in scolopidium 4. Scale bar, 0.01 mm.