American two-winged flies of the genus Stylogaster Macquart

Abstract

The present paper contains keys to the species of the genus, a dis cussion of generic and specific characters and the adult habits, and descriptions of all the known species from North and South America, 20 in number, of which 12 are new to science.Besides the collections of the United States National Museum, important material has been examined from the American Museum of Natural History, the Museum of Comparative Zoology, the Ca nadian National Collection, and the collections of Prof. A. L. Melander and Mr. H.J. Reinhard.Credit is given under the species for the borrowed material.A small but important collection, mostly