Article beginning on page 50.
Psyche 3:50, 1880.

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PSYCHE, Orgaa of the Cambridp htm@bl dab. -
SATES OF S UBSCRIPTIOY, ETC.
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wSItt8erfptioni not discontinued we considered resewed,
Sample oople8, postpaid, . . . 10 cents. Yearly subscription, postpaid, . . . $1. One volame (three yearn), postpaid, . . (8. Yearly, prinl^a on one side of thin paper (for pasting the titles of the bibliographioal reooira on title-#lips,) postpaid, . . . $I. One volume, printed on one aide of thin
paper, postpaid, . . . . . . $3.
One volume (mgri!&r) and one volume on
one side of thin paper,.postpoiil, . . . fS. twenty-flve eå´rtr copies, cJtwtge of
form, to the author of any loading article, if wikred at #h time of seiulinif espy, . Free, Author's extras over twenty-five In num- ber, tinder above mentioned conditions, each, 2 c. Separates, with obangea of form -actual cost of such changes In addition to ahove rates. -
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TERMS CAW- STItlCDW IN ADVANCE.
uy Only thoroughly respeotoble advertisements will be allowed Iii PSVWK, and tile
advertising
pages will be numbered consecutively with thosf of reacthe matter and Inflated at the end of tht volume. The editor8 reserve the right to rejcoi advertisements.
Sub~oribera to PSYCHE can advertise tnseoti for exuhnii^fl or deairfld .for study; no# far cash he, at the discretion of the editors.
Kegnlur style of ndvertiBementa plain, at thi followine rates: -
Outside Iniyn
Page. Pure*
Per line, first insertion, . . (0.10 $0.03 Eighth page, first insertion, . , .75 .W ENTOMOLOGISTS' MATERIALS FOR SAtS.
Klacgeids best Insect-pins, $5 inm. long. no. W; 3tl mm. long, no. 00-7. Per 1000: no. %,$1.10; 0th- ere, $1.9. Per SOW), $5.00 and W.W. Other sorts on ham; or to order, .Pins sold at the rates on& in W g e o 0 ' 500 ; smaller iota, 20 tits. per 100 ; sam- pie*?, fl cts.
Rouble boxus, for storing, 10x25 X35 tin., 45 etu. Usht inailing boxes, ti X 2i cm., and half and quar- ter size, 10.8,C cts.
Cork In sheets SOX 8.5 X 0.5 am., 12 cts. per sheet, 11.00 per 10 sheets.
Stout glass Woes. for alooholic specimens, 8 X 50 mm., 10X W mm., ISX 70 mm., Ìö1.30 $1 40, $LBO per lflfl ; rubber stoppers for these, ?l.(Ìö,?1.20,81.S per IMS ; tnlm and stopper, 3 cts. Other sizes of tubea and stoppers on bmd or to order.
Blank latoeis, r~tl-bordered, EX 14 mm., 36 cts. per IOOCT; 27x12 in'm., IS Uts. per 1000. A Bet of 1W generic end SOT specific labels, printed on above blanks. for United States and Canadian butterflies, complete to lR76, S1.m. Twelve sheets of printed labels, containing the namea of the North Ameri- can States wl Territories, of motstha, find sigaa for sexee, 2 cfa. a eheet, ftnd 2 cts, postage. Photogmplis of Proflryae, the Snt Iriiowu Xortli American fossil buttf,vfly; of the wintomy of the upper and of the UndW Bide dffarpabis caiigiiw/tvf, ainl ofthe underslte of J'wunw cmm: enoh Wets. Trftnaportfrtion on pins and labels, prepaid i on other goods extra.
B : PICK- MAXK, Cambridge, Mao.
EARLY ÌàTAGE OF B VTTEXFXIES WASTED.
The unde~8igmed desires to obtain, by exchange or otherwise, from all ptn-ta of the world, eggs, caterpillars and clq-salWa of Diurnal Lepidop" ma. Dried specimens are preferred, eapeeinily of caterpillars, which should be preparm1 by in- flation, Corrf~up~ndence is invite4 with persons engaged In the study of the early stages of butter- flies. 8. H. WUDI~EK,
Caiatwidge, Mass.
YATURAL HISTORY AGENCY,
The nndemigpedhafl foraftlo Eiitorno1ogiaia'm~- tariala of fill kina Insects, and Bniomologictll books.
Collections of Insects tor beghere or for schools furnished at re~8On8b19 rates. Several large collectioua of American ftud foreign Insects, princlpall~ Coleoptem, for sale cheap.
Eookn and materiais in other branchas of Nab uial History proanred for parties at a distance, at me loweat prices.
Lists of boolie, specimens, etc., sent for lBcenta. E: P. Auapu, 46 .East Newton St.,
Boston, Mass.




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