STUDIES ON CHALCID-FLIES OF THE SUBFAMILY LEUCOSPIDINAE, WITH DESCEIPTIONS OF NEW SPECIES. By Clara Jamieson Weld, Volunteer Aid, Division of Insects, United States National Museum. INTRODUCTION. While arranging the collection of Leucospidinae and Chalcidinae in the United States National Museum, a number of undetermined specimens of Leucospis and related genera were discovered. In try-ing to determine these it became necessary to go over the literature of the group, and the present paper is an outgrowth of the work thus started on this interesting group of parasitic Hymenoptera. The study is based not only on the material in the National Museum, but an attempt has been made to assemble all the available unworked material in the other leading American museums, specimens being borrowed particularly from Cornell University and the Academy of Natural Sciences at Philadelphia. The types of several species in the latter institution have also been studied, so that the paper represents the results of studies on practically all of the material available in this country, comprising some 36 species. Of the 14 new species here described, one is from the United States, four from Central and South America, three from India, two from China and Japan, and four from the Philippine Islands and Straits Settlements. The last comprehensive study of this group was made by Schlet-terer in 1890, and his monograph has been used as the basis for the present study. At the end of the paper will be found a list of the species described since 1890. These are arranged alphabetically by genera, with the locality indicated and with a short reference to the original description. In the bibliography which follows, a fuller citation is given and the papers are arranged chronologically under authors, bringing the literature from Schletterer to 1920. In the treatment of the various genera in the body of the paper, references have been omitted, the purpose being simply to supplement Schlet-terer's paper, which should be used in connection with this in the de-No. 2427— Proceedings U.S. National Museum. Vol. 61 ,Art. 6. 1
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