The morphology of the head of Homoptera

Although a great deal of attention, on the part of several workers, has been devoted to a study of the head structure of Hemiptera, the interpretation of which presents one of the most controversial questions in external insect anatomy, uncertainty still exists as to the correct homologies of the various sclerites. Hence in taxonomic papers the same part of the head may be named differently according to the views held by the respective authors. The present work has been made possible by the recent discovery of abundant material of Herniodoecus fidelis Evans, a representative of the Peloridiidae, which is undoubtedly the most archaic hemipterous family still in existenc