Article beginning on page 350.
Psyche 3:350, 1880.

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ubscribers to PSYCHE can advertise insects r exchange or desired for stndy, fwt for c&, ec, at the discretion of the editors
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3. STEBtanS, Springfield, Mass.
' . . 12s 1.00
' . . 3 % 1.73
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ach mhscipfcnt insertion om half the alwve rates. Address EDITORS OF P~YCUE,
Cambridge, Mass., U. S. A
ptions alao nsecsived in Europe by
R. FRIBDLAKDER & SOHN,
Carlatrasse II, Berlin, N. W.
EASLT STAGES OF B UTTESFLIES WASTED.
The undersigned desires to obtain, by oxchaiige or otherwise, from all parts of the world, eggs, caterpillars and clwysalifln of Diurnal Lepiriop- tern. Dried specimens sire preferred, especially of caterpillars, which should be prep~rfid by in- flation. Corresponddice is invited with'persona engaged bi tire study of the early stages ol"b11tter- flies.
S. H. SCL'DDER,
Camtiridge, Mass.
-.
COCCIDAE WANTKD.
The unflersiglicii is desirous of obtaining hy ex- change or othrwiae specimens of B? many spa. cies (if the COCCLDAE as possibles, for tho purpoiie of making a study of t.110 Noi'tli American forms. Thoac found iiifrstlng cultivated plants especial1 y cleaircd. Living specimens preferred when they cun be obmined.
J. Htsmtf COIISTOCS,
Department of Entomology,
The Cornell University, '
Illiaca, N. Y.
GALLS A&'D GALL INSECTS.
The undersigned desires, eitiicr by exaliange or otherwise, Gftlls from all pfirts of the United States. He Is especially interested in thoee made by Lcpidft~terti, Colwptera, Sonwptwa and Wptera. Correspu~ideuce in reference to Gall growths, or other vegetable abnormities. is invited, CHAULE~ V. RHET,
1700 Thirteenth St., X. W.,
Wasl~i~~on, D. C.
TOR TRICIDA E WA AWED.
I am clcairous of obtaining as many Korth Ameiicnn Tom~lcim~ as possible, tor tile pu-r- pose of atuilying this family. 1 alir~fl be glad to name unrt return Uny TOUTBICWAE forwarded to ims for tills purpose, save Such as may prove new BIUI ilcaii-al~Iu to retain for description. Pack care full^, find direct to
.
PROF. C. H. FKRNALD, OrOn0, Me.
iEpmOPXEKA.
Living rocoons, pupae and ovn of Amolcnii lep- idoptera bought or exchanged for other species, by Monsieur ALFRED WMLLT. (Meinbre-Laurtet cle la Socifit4 d'Acoliia~totl0n do France), Ill) Clnpliani Rofui. Loudon, S. W.,
England.
NOSTJI AMEEJCAS FSlLW.
CItcci; lists ofthe Ferns of A'ortli Americn north of Mexico. elnlmelx~titig 31 genera. iX4 apcctes and 15 viiriotius. on one octavo page. Will be sent by mail on receipt of the price, 15 cents pur dozen



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