Naturalists' Agency Advertisements, 



THE AMERICAN NATURALIST. 



This Illustrated Monthly Magazine of Nattiral History began its seventh 

 Volume with the Kumher for January, 1873. 



Every number of theXATDRALiST contains 64 lai-.are 8vo pages of read- 

 ing matter, illustrated by plates and woodcuts. All the leading naturalists 

 in the country cordially support it and contribute to its p.ages. The aim of 

 the erlitors is to make every number of the'magazine oi^ importance to all 

 ])eraons interested iu Xaturul History, and to keep its readers informed as 

 to the latest discoveries and advances made iu this yirogressive and pop- 

 ular science. Xo teacher or student can now consider himself " posted " 

 by simply studying tlie latest text books, for they are necessarily old almost 

 a.s soon as issued, and it is only by keeping informed of the daily progress 

 of science througli the medium of such niagazmes as the Naturalist that 

 it is possible to keep up with the tiines. Besides the leading articles in each 

 number there are the following specird headings, under which the Miscella- 

 neous and short notices are grouped — Jicvieirs and Hook Notices, Botany, 

 Geology,' Zoology. Anthropology, Microscopy. Kotes. Answers to Correspon- 

 dtnts. Xotices of Specimens for Exchange and Hooks liecnvcd. 



TERMS : Subscription $4.00 a Year in advance. $2.00 

 for Six Months. 



Single numbers 3.5 cents. Bound volumes §.t eacl). Covers for blading ."iO 

 cts. each. Subscrijjtiou to Vol. 7 (1S73) and the 6 preceding vols, unbound 

 for §21. 00, or bound for 82700. (The bound volumes form a handsome 

 illustrated work of reference that should be iu every library.) 



A. S. PACKARD, Jr., & F. W. PUTNAM, 

 Editors and Proprietors, 



K. H. WARD, of Troy, X. Y.. 



Associate Editor of Department of Microscoiiy. 



Address, 



AMEHIOAN NATUEALIST, Salem, Mass. 



For sale and subscriptions taken at any Book or Periodical St0)-e at pub- 

 lishers' prices. 



Bv ELLIOTT COUE.S, M.D. 



This work consists of 3(i9 Imperial Svo pages, and is illustrated by 6 Steel 

 Plates and 238 Woodcuts. It is designed as a Manual or Te.\t Book of the 

 Birds of North America, and is an exponent of the latest views in Or- 

 nitliology. 



The Introductory jiart gives a general account of the Anato.mv A^^) 

 Classificatiox of Birds, and full explanations of all the terms used in 

 Ornithology: a KEY to the Genera and Subgenera follows in tiio form of a 

 continuous artificial table, while a Synopsis of Livi.vg and Fossil Birds 

 contains concise descriptions of every North American Species known at 

 this time, with characters of the higher groups and remarks relating to 

 forms not found in North America, etc., etc. 



Price $7.00 a Copy in Full Cloth Binding. 



ABOUT INSECTS AND HOW TO OBSERVE THEM; An Elemen- 

 tary Treatise on the Structure and Classificatioa of Insects, by A. J. 

 Ebell, Ph.B. A r2mo pamphlet of 75 pages and 36 woodcuts. Price 30 

 cents. Sent post paid ou receipt of price. 



