Article beginning on page 180.
Psyche 3:180, 1880.

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ADVERTISEMENTS
should reach the editors by the loth of the month preceding the one in which they are to appear.
MANN'S CA TAL 0 G UE OF PLANTS.
Catalogue of the Phsenogamous Plants of the United States, east of the Mississippi, and of ihs Vascular Cryptogamons Plants of North America, north of Mexico. ad ed.
The recognized standard exchange list.
Each species bears the same numero as in the 1st ed., so that the 3824 numeros serve to designate the respective species. Price: 35 cts. ; 3 for $I.CO; 13 for $3.00; sent free by mail.
B: PICKMAN MANN,
Cambridge, Mass.
TOR TRICZDAE WANTED.
I am desirous of obtaining as many North Ameri- can TORTRICIDAE as possible, for the purpose of studying this family. I shall be glad to name and return any TORTRICIDAE forwarded to me for this purpose, save such as may prove new and desirable to retain for description.
Pack carefully, and direct to
PROF. C. H. FERNALD, Orono, Me.
PUBLISHED FORTNIGHTLY
ANNUAL SUBSCRIPTION (Postpaid), M 6.50=$1.62, Entomologische Nachrichten,
VI. Jahrg. 1880.
Herausgegeben von Dr. F. Ratter.
Baron v. Harold, Entomological Museum of Berlin, says of this magazine : 7
" It is a complete repository of interesting" and instruc- tive notices; of practical directions for collecting", ob- serving, and preparing specimens; of proposals for exchange and sale of insects; of literary information and notices of books; and correspondence. In short, it has proved itself the special organ for the encourage- ment and progress of the Science of Entomology." May be obtained of all booksellers ; and from the publisher,
A. DOSE,
PUTBUS A. RUGEN,
GERMANY.
Bftck volumes may be had from the same, 1875 a 2.50 M; 1877 a 3 M; 1878 a 5 M; 1879 6.50 M.
^g"" European exchanges and communica-
tions will receive more immediate attention by being addressed to
GEORGE DIMMOCK,
Leipzig, Germany.
LEPIDOPTERA.
Living cocoons, pupae and ova of American Lep- idoptera bought or exchanged for other species, by Monsieur ALFRED WAILLY, (Membre-Laurfat de la Societe d'Acclimatation de France),
11o'Clapham Road, London, S. W.,
England.
--
DIMMOCK'S SPECIAL BIBLIOGRAPHIES.
No. I. THE ENTOMOLOGICAL WRITINGS OF
JOHN L. LECONTE. Compiled by Samuel Hen- shaw. Edited by George Dimmock. Nov. 1878. 11 p. t 19 X 12.5. Price, 30 cents ; 011 5 X 12.5 title- slips, $1.25.
NO. 2. THE ENTOMOLOGICAL WRITINGS OF
GEORGE H. HORN. Compiled by Samuel Henshaw. Edited by George Dimmock. Jan. 1879. 6 p. t 19 X 12.5. Price, 20 cents; on 5 X 12.5 title-slips, 50 cents.
No. 3. THE WRITINGS OF SAMUEL HUBBARD
SCUDDER. Compiled and edited by George Dim- mock. Aug. 1879. 28 p. t 19 X 12.5. Price 50 cents. Address EDITORS OF PSYCHE,
Cambridge, Mass.
NORTH AMERICAN FERNS.
Check-lists of the Ferns of North America north of Mexico, enumerating 31 genera, 132 species and IS varieties, on one octavo page. Will be sent by mail on receipt of the price, 15 cents per dozen copies.
S. STEBBINS, Springfield, Mass.
COCCZDAE WANTED.
The undersigned is desirous of obtaining, by ex- change or otherwise, specimens of as many species of the COCCIDAE as possible, for the purpose of making a study of the North American forms. Those found infesting cultivated plants especially desired. Living specimens preferred when they can be ob- tained. J. HENRY COMSTOCK,
Department of Agriculture,
Washington, D. C.
No. 81 was issued 27 June 1881.




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