CUMENTS DEARI MENT OF THE INTERIOR. UNITED STATES GEOLOGICAL AND GEOGRAPHICAL SURVEY. F. V. HAYDEN, U. S. GEOLOGIST-IN-CHARGE. Insects. Diptera of West - Oelmsack. othu Insects- wher spidus Thorell BULLETIN BULLETIN NO. 2, VOL. III. TABLE OF CONTENTS. Nos. Titles. ART. XIII.—Western Diptera: Descriptions of New Genera and Species of Diptera from the Region west of the Mississippi, and especially from California. By C. ART. XIV.-Report upon the Insects collected by P. R. Uhler during the Explorations of 1875, including Mono- graphs of the Families Cydnidæ and Saldæ, and the Hemiptera collected by A. S. Packard, Jr., M. D. By P. R. Uhler. (Plates 27, 28). ART. XV.-Descriptions of the Araneæ collected in Colorado in Pages. |