Abstract
Ten nominal species of DELPHACIDAE have hitherto been regarded as synonymous with Sogata, furcifera (Horv.), which is notorious as a pest of Graminaceous crops in eastern Asia. In a recent study it was established that two members of this complex represented distinct species, and it was accordingly considered necessary to re-examine the status of the remainder: the results of such a study are reported in this paper. The members of this complex now recognised as distinct species number more than twenty: some are restored from synonymy and others are described as new, and all, as appropriate, are referred to one of three genera, Matutinus Distant, Sogatella Fennah (here accorded generic status) and a new genus, Sogatodes. Most of the species in the complex are redescribed and a key is given for the separation of all.

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