Letters received.] 26 [MayG, 



Darmstadt, July, 1867 ; Regents of the University of the State of New York, 

 Albany, August 2d, 1867 ; Massachusetts Horticultural Society, Boston, August 

 3d, 1867 ; Royal Society of London, August 13th, 1867 ; New York State Agri- 

 cultural Society, Albany, August 29th,. 1867; Literary and Philosophical Soci- 

 ety of Manchester, September 5th, 1867 ; Verein der Freunde der Naturge- 

 schichte in Meklenburg, Neubrandenburg, September 26th, 1867; New York 

 State Agi-icultural Society, Albany, September 7th, 1867; K. K. Geogi-aphische 

 Gesellschafl, Wien, September 10th, 1867 ; Royal Institution of Great Britain, 

 London, September 11th, 1867; Leeds Philosophical and Literarv' Society, Sep- 

 tember 17th, 1867; K. K. geologische Reichsanstalt, Wien, September 23d, 

 1867; Philosophical Societj^ Glasgow, September 24th, 1867; Nuturhistorisch- 

 medizinischer Verein in Heidelberg, September 24th, 1867; Royal Society of 

 Northern Antiquaries, Copenhagen, September 28th, 1867; Smithsonian Institu- 

 tion, Washington, September 28th, and October 8th, 1867; K. Bayerische botan- 

 ische Gesellschaft, Regensburg, two letters, September 28th, 1867; Naturfor- 

 schende Gesellschaft in Emden, October 9th, 1867; Naturforschende Gesell- 

 schaft, Basel, October 18th, 1867; Royal Physical Society of Edinburgh, 

 October 31st, 1867; Academic Royale des Sciences a Amsterdam, October 12th, 

 1867; Massachusetts Institute of Technology, October 21st, 1867; Essex In- 

 stitute, Salem, Mass., October 25th, 1867; Academy of Sciences, Chicago, Oc- 

 tober 28th, 1867; Soci^te d' Agriculture, etc., du Departement de la Lozere, 

 Mende, October, 1867 ; Soci^t^ d'Histoire Naturelle de Colmar,November 1st, 1867 ; 

 Soci(5t($ d' Agriculture, etc., du Departement de la Lozere, Mende, October, 1867; 

 H. Crosse, Paris, November 1st, 1867; Senckenbergische naturforschende Gesell- 

 schaft, Frankfurt am Main, November 1st, 1867; Connecticut Academy of 

 Arts and Sciences, New Haven, November 4th, 1867; Finska Lakare-Sallskapet, 

 Helsingfors, November 7th, 1867; Prof. Hyrtl, Vienna, November 8th, 1867; 

 Deutsche ornithologische Gesellschaft, Halle, November 8th, 1867; Real Acad- 

 emia de Ciencias, Madrid, November 12th, 1867 ; Kaiserliche Akademie der Wis- 

 senschaften, Wien, November 12th, 1867 ; Zoological Society of London, November 

 15th, 1867 ; Naturforschende Gesellschaft des Osterlandcs zu Altenburg, November 

 15th, 1867; Institut National Genevois, Geneve, November 17th, 1867; Ausschuss 

 des Vorarlberger Landesmuseums, Bregenz, December 11th, 1867 ; Royal Society 

 of Edinburgh, December 19th, 1867; Soci(5te Helvetique des Sciences Naturelles, 

 Berne, 1867; Zoologisch-Mineralogischer Verein, Regensburg, two letters; 

 Soci(5t(5 Hollandaise des Sciences a Harlem, January 18th, 1868; Essex Insti- 

 tute, Salem, Mass., January 20th, 1868; American Entomological Society, Phila- 

 delphia, February 1st, 1868 ; Essex Institute, Salem, Mass., February 10, 1868; 

 Smithsonian Listitution, Washington, February 12th, 1868; Natural History 

 Society of New Brunswick, St. John, February 18th, 1868; Essex Institute, 

 Salem, Mass., March 28th, 1868; Lyceum of Natural History, New York, April 

 7th, 1868 ; Society Entomologique Suisse, Geneve, acknowledging the receipt of 

 the Society's publications. 



From the Societe des Sciences, des Arts et des Letti-es du Hainaut, Mons, Bel- 

 gium, May 26th, 186G, Comite Scientifique de la Marine Imp^riale Russe, St.- 

 P^tersbourg, December 8th, 1866; K. K. Central- Anstalt fiir Meteorologie und 

 Erdmagnetismus in Wien, December 31st, 1866; Societa Italiana di Scienze 

 Naturali, Milan, January 1st, 1867; Naturforschende Gesellschaft, Freiburg, 



