the Province of Buenos Ayres. 
167 
that I am anxious to record. Every one in England is familiar 
with the subdued but querulous chuckle of the Blackbird, 
which it almost invariably utters before leaving the friendly 
shelter of a thick bush. Now, though Turdus leucomelas 
has scarcely any song, certainly nothing that can be com¬ 
pared to that of a Blackbird, it has exactly this same peculiar 
note, and utters it under precisely the same conditions as 
the Blackbird; and so much did this coincidence strike me, 
that I thought when I first heard the sound that an escaped 
Blackbird was the author of it. I look upon this as one 
of the many isolated facts which seem to prove descent from 
a common progenitor. Common at Baradero in April. 
2. Turdus rufiventris, Vieill.; Scl. et Salv. P. Z. S. 1868, 
p. 138. 
.Resident, but never observed in parties like the foregoing 
species. One shot on the 25th May had in its stomach re¬ 
mains of Coleoptera. Common at Baradero in April. 
3. Mimus calandria (Lafr. et D^Orb.); Scl.et Salv. P. Z. S. 
1868, p. 139. 
A few individuals remain with us all the winter; but the 
greater part are spring and summer visitors. Though it is 
the only bird here that can boast of really having a song, its 
vocal powers are chiefly exercised in imitating the notes of 
other birds, in which it shows great proficiency. Common 
at Baradero in April. 
4. Polioptila dumicola (Vieill.); Scl. et Salv. P. Z. S. 
1868, p. 139. 
Observed throughout the year, but not by any means a 
common bird. I found it plentiful at Baradero in April, 
frequenting thickets and low scrub, preferring wet marshy 
spots. Its food consists of small insects. Iris dark wood- 
brown. Legs, feet, and claws black. 
5. Troglodytes furvus (Gm.)j Scl. et Salv. P. Z. S. 1869, 
p. 158. 
Resident and abundant everywhere. I stated in my last 
note that this bird lays five eggs. I should have said seven 
or eight. Common at Baradero in April. 
n 2 
