ADVERTISEMENT. 



THE present " Synopsis of North American Lepidoptera" has 

 been compiled by the Rev. Dr. J. Gr. Morris, of Baltimore, at the 

 request of the Institution, to serve as a companion to the Cat- 

 alogue published in 1860. The work is necessarily incomplete, 

 claiming to be nothing more than a compilation of the published 

 descriptions of the species of the same order ; but its publication 

 has been earnestly urged, as tending to facilitate a knowledge of 

 an order of insects of great economical importance. 



Dr. Clemens, of Easton, Pa., has made a number of important 

 additions and corrections while the work was passing through the 

 press, besides furnishing an original Appendix. 



The Institution is also under obligations to Dr. J. L. Leconte, 

 Prof. S. S. Haldeman, Mr. W. H. Edwards, and Dr. B. Clemens, 

 for assistance in correcting the proofs of the work. 



JOSEPH HENRY, 



Secretary S. I. 



SMITHSONIAN INSTITUTION, 



WASHINGTON, February, 1862. 



ACCEPTED FOR PUBLICATION, OCTOBER, 1860, 



PHILADELPHIA: 



COLLINS, PRINTER, 



