Fig. 4. (A) Oscillograms of late instar Antheraea polyphemus sounds obtained during one-, two- and five-pinch trials. Arrows indicate the times when each larva was attacked. (B) Number of clicks in 60 s produced by late instar larvae following the first attack in one- (20.6±35.5), two- (25.1±22.5) and five-pinch (54.3±46.1) trials (means ± s.d.). The total amount of signaling is positively correlated with the number of attacks (*P<0.001).