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. 



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