ADVERTISEMENT. 



The present " Synopsis of North American Neuroptera" has 

 been prepared by Dr. Hermann Hagen of Konigsberg (one of the 

 highest living authorities on this subject), at the special request 

 of the Smithsonian Institution, from materials in considerable 

 part supplied by the collections of the Institution, or furnished for 

 the purpose, by correspondents, at its request. It is hoped that 

 the publication of this work and its distribution throughout the 

 country will call attention to the insects of this order, and result 

 in the collection of fuller materials, to be used hereafter in the 

 preparation of a more perfect report. 



For the purpose of making the present work serve the purpose 

 of a report on the Neuroptera of the New World, a list of the 

 names of the known South American species has been added. 

 Some of these have not yet been published, but descriptions of 

 them will shortly be presented to the world by Dr. Hagen in some 

 one of the German scientific journals. 



The manuscript of this work was furnish^ by Dr. Hagen in 

 Latin, and it has been translated into English by Mr. P. R. TJhler 

 of Baltimore. To him, and to Baron R. Osten Sacken, the Insti- 

 tution is under obligations for the careful examination and cor- 

 rection of the proof sheets. 



JOSEPH HENRY, 



Secretai-y S. I. 



Smithsonian Institution, 



Washington, June, 1861. 



ACCEPTED FOK PUBLICATION, NOVEMBER, 1860. 



PHILADELPHIA: 

 COLLINS, PKIXTEB. 



