ENTOMOLOGY for BEGINNERS 



For the use of Young Folks, Fruit Growers, Farmers, and Gardeners. By A. S. 

 Packard, M. D.\ Ph. D., 12 mo., $1.75. 



" It is the best thing of the kind in English, or any other language. There is no 

 work that I would recommend to the young student so heartily. " S. W. WILLISTON, 

 Professor in Yale University, New Haven, Conn. U. S. Henry Holt & Co., 

 Publishers, New York. 



THE AMERICAN NATURALIST 



Was commenced twenty-two years ago, by an association of the sudents of Professor 

 Agassiz, at Cambridge. While it has followed the fortunes of its founders from compara- 

 tive youth to a vigorous maturity, it has gathered to its support most of the biologists and 

 geologists of North America. 



Its constituency of authors includes a majority of the men of this class in the country. 



The proprietors have associated with Professors Cope and Kingsley, its principal 

 editors, a number of leading scientists, whose names are a guarantee of editorial ability. 



Dr. C. O. Whitman, of Milwaukee, one of our ablest histologists, directs the depart- 

 ment of Microscopic technique. 



Prof. W. T. Sedgwick, late of John Hopkins University, now of the School of 

 Technology, Boston, has charge of the Physiology. 



Prof. C. E. Bessey, of the University of Nebraska, edits the Botanical departments. 



The division of Anthropology is under direction of Mr. Thos. Wilson, whose connec- 

 tion with the Smithsonian Institution, Washington, D.C., gives him exceptional facilities. 



Prof. J. H. Comstock, the able Professor of Entomology of Cornell University, 

 sustains both pure and economic Entomology. 



Prof. W. S. Bayley, of the University of Wisconsin, has charge of Mineralogy. 



Mr. W. N. Lockington, naturalist and man of letters, of Philadelphia, furnishes the 

 best, and indeed the only abstract of the results of Geographical Explorations of the 

 World that is published on this Continent. 



Prof. J. A. Ryder, of the University of Pennsylvania, edits the department of Embry- 

 ology, a subject in which he is a well-known master. 



It has been the aim of the Naturalist to preserve its well-known national character, 

 which is illustrated in the wide distribution of its editorial responsibilities. 



It appears to be the most favored medium of publication of the naturalists and 

 biologists in the United States, when they wish to bring the results of their investigation 

 before the general public in a more or less popular form. It is the only magazine in the 

 world to-day which keeps its readers en rappoi-t with the work of Americans in the field 

 of the Natural Sciences. The Naturalist publishes 96 large octavo pages per month, 

 with numerous illustrations. TERMS: $4 PER YEAR ; 40c. PER NUMBER. 



LEONARD SCOTT PUBLICATION CO., 



501 Chestnut Street, Philadelphia. 



NORTH AMERICAN DIPTERA. 



Synopsis of the Families and Genera of North American Diptera (exclusive of 

 the Genera of the Nematocera and Muscida? sens, lat.), with Bibliography and New 

 Species, 1878-88. By S. W Williston ; 82 pages ; price, $1.00. 

 Address the publisher, 



JAMES T. HATHAWAY, New Haven, Conn 



PAMPHILA and CATOCALA. 



The undersigned will pay good price, either in cash or exchange, for perfect 

 specimens of Pamphila and Catocala. 



PHILIP LAURENT, 621 Marshall St., Philadelphia, Penn. 



