Abstract
This is an account of work carried out in Kordofan on behalf of the Imperial Institute of Entomology. The period August-September 1931 was occupied with preliminary surveys and observations on hopper bands. From July to September 1932 and from March to July 1933 the ecology of the solitary phase of Schistocerca gregaria was studied at Um Darag ; and in January 1933 a locust survey of the more northern parts was carried out.

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