Ill 



you that this Society congratulates the Société Impériale 

 des Naturalistes de Moscou on having accomplished fifty 

 years of its existence , and hopes it may long continue 

 to give to Natural - History Science the henefit of its 

 assistance and support. 



The Entomological Society avails itself of this oppor- 

 tunity to express its desire to preserve the amicable re- 

 lations which have so long existed with your Society , 

 and with tli is letter has directed to be sent to it the 

 Transactions which have been published since the last 

 parcel was sent to you. 



We have the honor to be , Sir , Your very obedient 

 servants 



Secretaries: J. W. Douglas. — Edwin Gluplurg. 



London , 

 13 October 1855. 



43. De la Société américaine philosophique de Phila- 

 delphie, adressée à Mr. le Premier Secrétaire: 



Hall of the American Philosophical Society. 



We have the honour to acknowledge the receipt of 

 your letter of Juli 24 (Aug. 5) making known the in- 

 tention of the Imperial Society of Naturalistes of Moscow 

 to celebrate the fiftieth anniversary of its foundation. 



On this happy occasion we are directed by the Ame- 

 rican Philosophical Society to offer , in its behalf , our 

 warmest congratulations, and to express the sentiments 

 of earnest regard with which our Society cherishes the 

 friendship and sympathy existing between the Imperial 

 Society and our own. 



Long may the friendly intercourse , established on so 

 firm a basis, continue, — and may the extensive series 

 of valuable scientific memoirs , which , through your 



