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G. lecontei. (A) Spray pattern on indicator paper elicited by pinching a beetle’s left midleg with forceps. (B) Comparable to preceding, but elicited by pinching another beetle’s left hindleg. (C and D) Frames from a slow-motion videotape of a beetle’s discharge (discharge duration = 116 ms). The jet of spray, visible as a faint line above the arrow in each picture, changes in direction during the ejection. The arrows a and b denote the limits of this directional sweep. (Bar: 1 cm.)
