100 DRAGON FLIES A^S. MOSQUITOES. 



It is certainly to be hoped and expected that Dr. R. H. 

 Laniborn's public spirited inquiries and attention to this 

 subject will result in securing some alleviation from the 

 persecution of the irrepressible and vicious Culex. 



My thanks are due to Mr. L. P. Gratacap for his nu- 

 merous suggestions and assistance he has given me in the 

 preparation of this work. 



Note. — The plates and catalogue prepared by Mr. Beutenmuller, 

 and accompanying his essay, will be found at the close of the 

 volume. 



