INTRODUCTION. Vll 



J. Ritchie, Esq., from Tunis. 



Rev. T. R. Lowe, and 0. Blewitt, Esq., from Madeira. 



J. Burton, Jim., Esq., and Sir John G. Wilkinson, from the 



Red Sea. 



Lady Frances Cole, from the Mauritius. 

 M. Matthieu, from the Isle of France. 



Purchased of 



Mr. Eraser, from the Coast of Barbary and W. Africa. 

 Dr. Janvier, from the Mauritius. 







North American species, presented by 



Colonel Edward Sabine, from Baffin's Bay. 



Thomas Say, Esq., from the United States, being the types 

 of the species he described. 



Edward Doubleday and B. Wins tone, Esqrs., and Dr. Wag- 

 ner, from the United States. 



W. C. St. John, Esq., from Newfoundland. 



Dr. Philip Maclagan, from Canada. 



Rev. Lansdowne Guilding and E. Redman, Esq., from the 

 West Indies. 



Lady Katherine Douglas and Sir George Simpson, from the 

 West Coast. 



Purchased of 

 Mr. Scrivener and Mr. Gosse, from the West Indies. 



The South American species, presented by 



Lord Stuart de Rothesay, W. Stvainson, E,sq. 9 J. P. George 

 Smith, Esq., and Mrs. Smith, from the Coast of Brazils. 

 Sir R. Schomburgk, from British Guiana. 



