Fifteen parts of this work have been published containing figures and descriptions of many North American species. JOHN B. SMITH.--An Introduction to a Classification of the North American Lepidoptera. <Bull. Brookl. Ent. Soc., Vol. VII, 1884, pp. 70-74 and 81-83. A synopsis of the families of Lepidoptera based on Herrich-Schaeffer's classification. ---- Synopsis of the Genera of the North American Rhopalocera. <Bull. Brookl. Ent. Soc, Vol. VI, 1883, pp. 37-45. E. DOUBLEDAY AND W. C. HEWITSON.--The genera of diurnal Lepidoptera, comprising their generic characters, a notice of their transformations, and a catalogue of the species of each genus; illustrated, with 86 colored plates from drawings by W. C. Hewitson. 2 vols., London, 1846-'52. This work was completed by Westwood after the death of Doubleday. S. H. SCUDDER.--Butterflies: Their structures, changes, and life-histories, with special reference to American forms. Being an application of the "Doctrine of descent" to the study of Butterflies, with an appendix of practical instructions. 321 pp. and 201 text figs. New York, Henry Holt & Co., 1881. ---- The Butterflies of the Eastern United States and Canada with special reference to New England. 3 vols., Cambridge, Mass., 1889; pp. 1958, plates 59. (Published by the author. Cost about $75 for 3 vols.) G. H. FRENCH.--The Butterflies of the Eastern United States. For the use of classes in Zoology and private students. Philadelphia, Lippincott & Co., 1886. Gives synopses of the genera and species, and description of the species. W. H. EDWARDS.--Butterflies of North America. Boston, Houghton, Mifflin & Co. Two volumes are completed and the third is in course of publication. HEMIPTERA. HERBERT OSBORN.--Classification of Hemiptera. <Entomologica Amer., Vol. I, 1885, pp. 21-27. Short characterization of the whole order, with tables of suborders and families. ---- Pediculi and Mallophaga affecting Man and the Lower Animals. Constituting Bulletin No. 7 of the Division of Entomology, U. S. Department of Agriculture. Washington, 1891. P. R. UHLER.--List of Hemiptera of the region west of the Mississippi River, including those collected during the Hayden explorations of 1873. <Bull. U. S. Geolog. and Geogr. Survey of the Terr., Vol. I, 1875, pp. 267-361, Pl. XIX-XXI. ---- Report upon the insects collected by P. R. Uhler during the exploration of 1875, including monographs of the families Cynidae and Saldae, and the Hemiptera collected by A. S. Packard, jr., M. D. <U. S. Geolog. and Geogr. Survey, Bulletin, Vol. III, No. 2, 1877, pp. 355-475. TOWNEND GLOVER.--Report of the Entomologist. <Report of the Commissioner of Agriculture for the year 1877, pp. 17-46. A popular treatise on the Homoptera, with illustrations.