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Fig. 2. Characterisation of trichoid hairs on the wings. (A) Two sections of a
continuous recording from a basiconic sensillum on the dorsal surface of a
forewing. One afferent responded with an 800 ms burst of spikes after the
electrode was first placed over the intact tip of the sensillum (upper trace).
After the afferent fell silent, a brief movement of the sensillum (horizontal
bar) elicited a burst of spikes in a second afferent that had larger amplitude
spikes (lower trace). (B) The afferent of a long hair on the postcubitus vein
of the upper surface of a forewing responded with a burst of spikes to a brief
movement of the hair (bar). The recording was made from the cut shaft. (C,D,F)
Recordings from the cut shafts of medium length hairs on the ventral surface
of a forewing (C), dorsal surface of a hindwing (D) and ventral surface of a
hindwing (F). In all cases, movement (bars) elicited a burst of spikes in a
single afferent. (E) Two sections of a continuous recording from a basiconic
sensillum on the ventral surface of a hindwing. One afferent responded with a
600 ms burst of spikes after the electrode was first placed over the intact
tip of the sensillum (upper trace). After the afferent fell silent, a brief
movement of the sensillum (horizontal bar) elicited a burst of spikes in a
second afferent that had a different waveform (lower trace). Basiconic
sensilla were not seen on the ventral surface of the forewings or dorsal
surface of the hindwings.
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