Notes on Locusts of Economic Importance, with some new Data on the Periodicity of Locust Invasion

Abstract

The present paper is a part of the results of my revisional work on the group Cyrtacanthacrini, which includes all the swarming locusts except Locusta migratoria (L.), the latter having formed the subject of a previous paper. The revision itself, being of a purely systematic character and dealing also with a large number of species of no economic interest, is being published elsewhere, but I thought it might be useful to economic entomologists to give here the principal conclusions arrived at concerning the species of known agricultural importance, especially because this presents an opportunity of discussing some important points in the bionomics of swarming locusts which would be out of place in the revision itself.