Of these Mecistura has been used by many writers for Parus 

 caudatus, so also has Melizophilus for Sylvia undata, Squatarola 

 for Charadrius helveticus, Macrorhamphus for Scolopax griseus, 

 and Gallinago for Scolopax gallinago, &c. Pavoncella is equiva- 

 lent to Machetes, Cuv. and antedates it by one year, but the 

 former name has hardly ever been used, whereas the latter has 

 been generally adopted. 



As will be seen by reference to the text, none of these names 

 were introduced with any description whatever, and for this 

 reason, if for no other, they fail to meet the requirements of 

 the British Association Rules, which demand that a generic name 

 to pass current should be accompanied by a clear exposition of 

 the essential characters of the genus. This disposes of Pavon- 

 cella, but Mecistura, Melizophilus, Squatarola, Macrorhamphus, 

 and Gallinago may be employed in virtue of their subsequent 

 adoption by later writers. 



The only copy of this Catalogue that I have seen is in a 

 volume of Pamphlets in the Zoological Department of the British 

 Museum, and from it this reprint has been taken. The chief 

 value of the latter is rather of a negative character, as shewing 

 the worthlessness of the Tract, and that far higher consideration 

 has been set upon it by writers on European birds than it at all 

 merits. 



OSBERT SALVIN. 



10, CHANDOS STREET, CAVENDISH SQUARE. 

 LONDON. 



