328 Recently published Ornithological Works. 



examples of Emu at all, as they were landed without arms, 

 provisions, or shelter, and the weather was so bad during 

 that time, that the ships had to put off from the island. 



He believes that both the individuals figured on Peron's 

 plate came from Kangaroo Island, and that there was con- 

 siderable sexual dimorphism in this species, not only in 

 dimensions but also possibly in plumage, and that the 

 measurements of the semi-fossil bones of the King Island 

 Emu seem to show that the same variation in dimensions 

 also existed among the Emus of that island. 



Faxon on Brewster^ s JVarbler. 



[Brewster's Warbler {Helmijithophila leucobronchialis) : a Hybrid 

 between the Golden-winged Warbler {Hehninthophila chrysoptera) and 

 the Blue-winged Warbler {Hehninthophila pinus). By Walter Faxon. 

 Mem. Mus. Comp. Zool. Harvard Coll. xl. 1913, pp. 311-316.] 



This is a continuation of a paper previously published in the 

 same periodical [vide * Ibis/ 19J1, p. 760), and contains the 

 results of Mr. Faxon's observations in 1913 on the Warbler 

 population of a certain swamp near Lexington, Mass. Here 

 in early May a male Golden-wing was observed mated with 

 a female Blue-wing. The birds were constantly watched, 

 and the young first observed about June 15 ; by July 12 the 

 young birds had lost their nesting-plumage completely, and 

 were found to be undoubted examples of the form known 

 as Helminthophila leucobronchialis, which is thus proved to 

 be a hybrid. Another pair, also closely watched (a male 

 Brewster's and a female Golden-wing), produced a brood 

 the majority of which were Brewster's, but one was a 

 Golden-wing male. The latter and one of the Brewster's 

 were banded, and it is hoped they may return this 

 next summer to the same swamps, when Mr. Faxon and 

 Dr. Tyler hope to extend their observation over three 

 generations. 



This and the previous paper are of special interest to all 

 students of heredity and Mendelian law, and should be care- 

 fully read through by them, as such cases as these can be 

 but seldom observed in natural conditions. 



