278 Mr. C. H. E. Grant on 



Phaethusa magnikostris. 



The following correction should be made in ray paper 

 ('Ibis,' 1911, p. 471):— 



In the last line but one, '' they were " should be " this 

 species (P. magnirustris) was/' 



j\roLOTiiRi. (Text- fig. 5.) 



A rather hopeless state of confusion exists with regard 

 to the eggs of the three species of Molothrus found in 

 the Argentine, viz. : M. bonariensis, M. rufo-axillaris, and 

 M. badius. 



Text fi}-- 5 



A. '^ B. 



C. D E 



A, E. Eggs of Molothrus hadit/.i. 



C-E. ,, Molothrus rufo-axillaris. 



1 have recently carefully examined the series now in the 

 British Museum, and have been able to come to the follow- 

 ing conclusions, which throw some further light on this 

 interesting question. 



Also I have compiled a list of the foster-parents of the two 

 parasitical members, not only from my own observations, but 



