PSYCHE ADVERTISER. 



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No. 1. — 10 on a sheet. No. 2.— 50 on a sheet. 



Geo. Dijimock. Cambridge, Mass. 



With the next Ho. PSYCHE begins its second 

 year, and will be sent only to those who shall 

 have paid for it, or are to receive it gratis. 



The subscription price.for the balance of the volume, twenty numbers, 

 will be one dollar and fifty cents until the first of May, after which, until 

 further notice, it will be one dollar and sixty cents. 



NOTICE TO SUBSCRIBERS. 



The recent sudden change in the rates of postage for "third-class mat- 

 ter" having made it necessary to introduce changes throughout the list 

 of works published with our last issue, we have found it convenient to 

 change the list in republishing it. 



COLEOPTERA FOR EXCHANGE. 



Cieindela puritana, Uyliodes blplngmtm^ or other Coleoptera will be 

 exchanged forNos. 1, 3, 6, 7, 10a, 11, 15b, 16, 17, 19, 20. 23. 27, 28a, 

 29, 31, 35, 36a, 36b, 37, 37a. 40, 43, 46, 47, 55. 55b, and 58 to 66, 

 of Crotch's List. Geo. Dimmock, Cambridge, Mass. 



BOOKS FOR SALE. 



Pacific Railroad Exlorations and Surveys; 13 vols, in original 

 binding, with the solution of the problem : How to refer definitely 

 and simply to the separate parts of the work. . . .$35.00 



Boston Journal of Natural History, Vol. II. (Formerly the 

 property of Dr. A. A. Gould) .... bound 7.00 



Bost. Journ. Nat. Hist. Vol. VI. (Formerly Dr. G.'s ; contain- 

 ing manuscript notes by him) .... bound 7.00 



Bost. Journ. Nat. Hist. Vol. V, No. 1. (p. 1-136; pi. 1-13) 1.75 



Bost. Journ. Nat. Hist. Vol. V, No. 4. (p. 417-505 ; pi. I-IV, 

 XXIII, XXIV, XXX, XXXI) ... . 2.00 



Proceedings of the Boston Society of Natural History, Vol. I. 

 (Formerly Dr. Gould's ; with his autograph) . bound 2.75 



Enumeration of Hawaiian Plants, by Horace Mann, Jr. .50 



Catalogue of the Phamogamous Plants of the United States, 

 east of the Mississippi, and of the Vascular Cryptogamous Plants 

 of North America, north of Mexico. [Four for one dollar] .35 



Apply to B. Pickmax Mann, Cambridge, Mass. 



