VI PREFACE. 



7. Other species collected in South Carolina by Mr. Zimmer- 

 mann, and furnished by the late Prof. Germar of Halle. 



8. A considerable number of Neuroptera collected in Cuba and 

 furnished by Prof. Poey of Havana. 



9. A considerable number of Neuroptera collected in Mexico 

 and supplied by Mr. de Saussure of Geneva. 



10. My own collection, containing the types of Winthem, de- 

 scribed by Prof. Burmeister, and some species furnished by the 

 late Mr. Say. 



11. Many species collected in the Russian colonies and in Cali- 

 fornia, communicated by Mr. Menetries from the Imperial Museum 

 of St. Petersburg, and by Colonel Motschulsky. 



12. The Neuroptera of North America of the Museum at Ber- 

 lin, furnished by Dr. Gerstaecker. 



13. The Neuroptera of North America of the Museum at Ti- 

 enna, communicated by Mr. Kollar. 



14. The Neuroptera of North America of the collection of the 

 Baron Selys Longchamps at Liege, with the types described by 

 Messrs. Rambur, Latreille, Palisot de Beauvois, contained in Ser- 

 ville's collection, and some supplied by Mr. Asa Fitch. 



15. Some types, chiefly from Labrador, described by Mr. Bur- 

 meister, and contained in the collection of Mr. Sommer at Altona. 



16. The very great number of Neuroptera of the British Museum 

 in London, described by Mr. Fr. Walker, chiefly from Canada and 

 the polar regions, which I examined at London in 1851, with the 

 kind permission of Dr. J. E. Gray. 



I have endeavored to cite the literature of the subject as com- 

 pletely as possible. Besides the printed works, I have taken ad- 

 vantage of written communications made by Mr. Haldeman and 

 Mr. TJhler on those species, which had been described by them. The 

 rare memoir of the late Mr. Say, "'Godman's Western Quarterly 

 Reporter, Yol. II," could not be procured, except in a manuscript 

 copy kindly communicated by Baron Osten Sacken. 



An exclamation mark (!) has been added to every species con- 

 tained in my own collection, or described by me from actual exa- 

 mination. 



Where an (1) has been added to the name of the author, I have 

 seen the types which he described. 



The foregoing statements show that the Synopsis has been prin- 

 cipally composed from species which I myself have examined, and 



