iv PREFACE. 



vered. Our new territorial acquisitions in the West are con- 

 stantly affording remarkable insect novelties, all of which will be 

 described in the course of time by our naturalists. The science of 

 entomology is rapidly advancing in our country; every year the 

 number of students is increasing, and discoveries of new species in 

 all the orders are of frequent occurrence. 



It will be observed that the Catalogue contains very few micro- 

 lepidoptera. That section has, as yet, received but little attention 

 in the United States; Dr. B. Clemens, of Easton, Pa., however, is 

 now making a special study of it, and has kindly furnished me with 

 the names of his species as far as published. Dr. Herrick-Schaeffer, 

 of Ratisbon, Bavaria, has described some other species, which may 

 hereafter be added to this Catalogue as an Appendix. 



I desire in this place publicly to express my obligations for the 

 very valuable aid afforded me by Professor S. S. Haldeman, of 

 Columbia, Pa., by Dr. J. L. Leconte, of Philadelphia, and by Dr. 

 B. Clemens, of Easton, Pa. Other gentlemen have contributed 

 material and counsel, for all of which I am truly grateful. 



JOHN G. MORRIS. 



Baltiaioke, March, 1860. 



