NEW DRAGON-FLY NYMPHS IN THE UNITED STATES NATIONAL MUSEUM. By James G. Needham. Of Lake Forest f'Dllt'i/i', Ijtkr Forext, Illinois. The immature Odonata in the United States National Museum have come together during a long period of years from many diverse and ahiiost accidental sources. Save for a few specimens collected by Dr. Charles V. Riley, and sent to Dr. H. Hagen njan}-3'ears ago, two Columbia River species donated to the Museum b}^ Dr. H. Hagen, and a few Illinois species donated by m3"self, they have 1 ot hitherto been studied. Recently, while examining and naming the nymphs of this collection, it became apparent that some interesting undescril)ed forms were at hand, and that their careful study would throw light on the interrelationships of the groups to which they belong; and then the preparation of this paper was undertaken. Concerning the sources of the material from the National ]\Iuseum hereinafter described, I am indebted to ]Mr. RoUa P. Currie, of that institution, for the following data: A number of nymphs were collected in Arizona in the summer of 1901 by Messrs. H. S. Barber and E. A. Schwarz; several bred speci-mens, and others, are from the collection of Messrs. H. G. Hubbard and E. A. Schwarz, and were taken, principally, in ^Michigan, Florida, and the West; a large number of n3'mphs were contained in the collection of insects from Java made in December, 189(1, by Mr. D. (J. Fahcliild. of the United States Department of Agriculture; single speci(>s were ol)tained in the Congo by Mr. J. H. Camp, of Lima. Ohio; in Miya-zaki, Japan, by Rev. Cyrus ]\I. Clark: in Nicaragua. I)y Dr. Charles W. Richmond; in the Galapagos Islands, by Dr. Ct. Bauer, of Clark University; in the Yellowstone, by Dr. C. Hart Merriam. and in Cali-fornia by Mr. Albert Koebele, of the Department of Agriculture. In addition to these there is (piite a collection from various parts of the United States made })y the United States Fish Conunission. though the majorit}^ of the specimens belonged to specie'^ the nyni))hs of which have previouslj' been described. Proceedings U. S. National Museum, Vol. XXVI I-No. 1371. ()S5
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