The Internal Anatomy of the Clover Root Mealy-bug, Trionymus trifolii, Forbes (Homoptera, Coccidae).

Abstract

The purpose of this paper is to present the more important features of the internal anatomy of a subterranean viviparous mealy-bug commonly found on the roots of clover in the eastern part of the United States. Only the female was studied, since the male has never been found. No attempt was made to present many of the details which were found to resemble homologous parts of the common oviparous mealy-bug, Pseudococcus citri, Risso, as described by Berlese in 1893.