APPENDIX I. 293 



Hiibner. " Zutrage zur Sammlung exotischer 

 Schmetterlinge," 5 parts, 4to. Augsburg, 1818-37. 



Cramer. " Papillons Exotiques." 4 v., 4fco. Ams- 

 terdam, 1775-82, and supplement by Stoll', 1 v., 4to, 

 Amsterdam, 1787-91. 



Felder. " Novara Reise. Lepidopteren. " 4to., n. d. 

 Wien. 



A convenient catalogue of the butterflies of the world 

 is Kirby, " Synonymic Catalogue of Diurnal Lepidop- 

 tera." *8vo. London, 1871, and supplement, 1877. 



For catalogues of our own butterflies see Edwards' 

 list in the " Transactions of the American Entomolo- 

 gical Society," vol. 6, 1877, and Scudder's lists in vols. 

 2 and 3 of the " Bulletin of the Buffalo Society of 

 Natural Sciences," 1875 and 1876 ; these last include 

 only the two higher families. See also Strecker's 

 " Butterflies and Sloths of North America," 8vo, Read- 

 ing, 1878; and Gerhard's " Systematisches Verzeich- 

 niss der Macro-Lepidopteren yon Nord-Amerika," 8vo, 

 Berlin, 1878. 



Much relating to our butterflies will also be found in 

 the Proceedings of the Academy of Natural Sciences of 

 Philadelphia, the Boston Society of Natural History, 

 and the California Academy of Natural Sciences, as 

 well as in the Bulletin of the Buffalo Society of Natural 

 Sciences. 



The best way to commence the study of butterflies is 

 to attempt to follow out the life-history, write the bi- 

 ography in short, of every kind found in one's own 

 neighborhood. No one place will yield much above 

 one hundred species, and, if the rarer kinds be omitted, 

 not nearly so many. Yet any one who will accomplish 

 this will add materially to what is known, and he will 

 find his way pleasanter, his occupation more fascinat- 

 ing at every step. He need be provided at the outset 

 with a very moderate stock of the articles mentioned in 

 the preceding pages. He should keep a journal devoted 

 exclusively to a record of his daily notes, which will 



