33 Mr. H. Durnford on some Birds observed 



birds sliowed great anxiety at my presence, allowing me to 

 come Avithin a few feet of tlicm. They appeared to be pre- 

 cisely alike in size and plumage. 



Troglodytes furvus. 



Pretty common. The Chuput-valley Wren is smaller than 

 any Buenos-Ayres examples I have seen. It has a slightly 

 rufous tinge about the vent ; bat I do not think the difference 

 sufficient to indicate that the species are distinct. Four eggs 

 which I brought back with me are slightly smaller than eggs 

 of T. furvus from here. It has been thought there may be two 

 species of Wrens in Buenos Ayres ; but this question can only 

 be decided by the acquisition of more specimens. A slight 

 discrepancy in size alone is not sufficient to establish another 

 species. The Chuput bird is less than the smallest race, or 

 whatever it should be called, of our Buenos-Ayres bird. 



Anthus correndera"^. 



Common throughout the valley and on the hills where there 

 was any grass. 



Progne purpurea. 



Pretty common about the Tosca cliff, up the valley, in the 

 crevices of the rocks of which it was breeding. The male is 

 uniform glossy steel-blue, and easily distinguishable from the 

 female, whose underparts are speckled with grey, lightest 

 about the vent. Both sexes uttered harsh screams whilst we 

 were sitting under the cliff. A few seen at Ninfas Point. 



Atticora cyanoleuca. 



Pretty common. Nesting in holes in the banks in some 

 of the upper reaches of the river. 



HiRUNDO LEUCORRHOA. 



Also common. On the evening of the 25th November I 

 observed many birds of this species congregating as if for a 

 migratory movement. 



* [Mr. Uiu-nforcl's collection coutaius two specimens of tliis species, 

 one from Punta Lara, the other from Flores, near Buenos Ayres. He 

 has not sent any from Chuput. — 0. S.] 



