Article beginning on page 338.
Psyche 3:338, 1880.

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RA TSS OF SUBSCRIPTION, ETC.
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on title-slips), postpaid. . . . . $1.
One volume, printed on one side of thin paper, postpaid, . . . . . . . $3.
One volume (regular) and one volume on one side of thin paper, postpaid. . . . . $5. Twenty-five extra copies witho7d change of @rn, to tile author of any leading article if or- dend at the time of swding espy, . . . Free. Author's extras over twenty-five in number, under above-mentioned conditions, each, E C, Separates, with changes of form -actual cost of such changes in addition to above rates. SS* Scimttjfc publications desired in exchnp. -
AD VEXTISING RATES, E TC.
TERMS CASH -STRICTLY N ADVANCE.
Only thoroughly respectable advertisements will be allowed in PSYCHE, and the advertising pages will be numbered consecutively with those of reading matter and indexed at the end of the volume. The editors reserve the right to reject advertisements. Subscribers to PSYCHE can advertise insects for exchange or desired for study, not for cash, free, at the discretion of the editors,
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Outside Inside
Pnffe. Pngea,
Per line. first insertion, , . . . go-to Eighth of page, first insertion, . . . .75 .6o Quarter " " ca -1.25 1.00
Half
,, ,, 4,
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One
0' ,, ,,
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Each subsegifeitf fftswtiofi one-half the above rui~s. Address EDITORS OF PSYCHE,
Cambridge. Mass., U. S. A.
Subscriptions also received in Europe by R. FR~EDLANDER & SOHN,
CarIsstasse 11, Beriin, N. W.
ENTOMOLOGISTS' MA TEJRIALS FOR
. SALE.
Intending not to keep goods for sale hereafter, 1 offer the remainder of my stock as follows:- Minute bent-wire pins, for Micros, these pins so constructed as to be mounted conveniently on ordi- nary entomological pins;
50 cis. per loo. [No more
ordinary eKtemoZog'tcul pws for sa24
Blank labels, red-bordered, 22x14 mm., 33 cts. per moo; q'X ia mm., 45 cts. per TOOO.
B: PICKMAN MANN,
Department of Agriciilture,
Washington, D. C.
GALLS AlfJO GALL INSECTS.
The undersigned desires, either by exchange or otherwise, Galls from all parts of the United States. He is especially interested in those made by Leptdo- pim, Colcopf^ys., Hornoptem and Diptern. Corres- pondence in reference to Gall growths, or oilier vegetable abnormities, is invited.
CHARLES V. RILEY,
17w Thirteenth St., N. W.,
Washington, D. C.
EARLr STAGES OF BUTTERFLIES
WANTED,
The undersigned desires to obtain, by exchange or otherwise, from all parts of the world, eggs, cater- pillars and clirysalids of Diurnal Lepidoptera. Dried
specimens are preferred, especially of caterpillars, which should be prepared by inflation. Correspon- dence is invited with persons engaged in the study of the early stages of butterflies.
s. H. scunm~,
Cambridge, Mass.
BACK NLTMEROS OF PSI-CHE,
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Price: a copies for 15 cts,: 4
copies for 20 cts. Nos. 2, 4, 3, 8- r2, m. 21, as, å£6 27, 29,m 31+37,38. 39-p, 47-48. 51-52. 5~-56.'60. 61-&2 (no plate), 6465-68. Any two of the above will be exchanged for any one of the following: Nos. 1.69, to. 16, 18, a&4I-4% 43-44, 49'50. 53-54.58. %- Also. nos. +,TO, 73,74.77,78,79, So. at. 82. 83. 86. 87-#$,go-p. Price per numero, 15 cts.
No. 32 (index to vol. I), 30 cts.
Alphabetic index to vol. 2, 30 cents.
[Systematic
mdcx and title-page to woi. s, uoiyet flbKshtd.1 Address ; EDITORS OF PSYCHE,
Cambridge, Mass.




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