oa Journal of the Entomological Society of Southern Africa - Do nymphs of Acrididae stridulate?



On a number of occasions it was observed by the authors that nymphs of the Brown Locust, Locustana pardalina (Walk.), moved their hind legs very rapidly and in such a manner that the hoppers appeared to be stridulating. The hopper rapidly moves the hind femora upwards and downwards in a vertical plane, the femora articulating on their basal joints. The angle between the femur and tibia apparently remains constant. Both legs are in action simultaneously. The movements are very rapid, and the speed is estimated at about five times per half second.


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