INTRODUCTION. 



Mr. Ridgway, of the U.S. National Museum, Washington, has 

 rendered me material assistance in working out some of the genera 

 of the same difficult group. 



Finally, I must again ask to be allowed to record the great 

 obligations which I am under to Messrs. Salvin and Godnian, who 

 have permitted me to remove to my own rooms and examine the 

 whole of their specimens before transferring them to the British 

 Museum. This great boon has materially lightened my labours in 

 the composition of the present volume, and the same kind indulgence 

 has been shown to me as regards the remainder of the Mesomyodian 

 Passeres, which are to be catalogued in the next volume. 



P. L. SCLATER. 



o Hanover Square. 

 May 12, 1888. 



