Catalogue of the Described Diptera of North America (Classic Reprint) C. R. Osten-Sacken

Excerpt from Catalogue of the Described Diptera of North America

The aim of this work requires no explanation. A complete inventory of a branch of entomological science, at a given moment of its existence, is the best means for promoting its Это и многое другое вы найдете в книге Catalogue of the Described Diptera of North America (Classic Reprint) (C. R. Osten-Sacken)