Barrows on Birds of the Lower Uruguay. 
87 
iss.v] 
6. Cistothorus platensis {Lath.). — Only observed on one 
or two occasions in the half-flooded meadows which border the 
stream at *Carhu6. 
7. Anthus correndera ( Vieill.). — Found everywhere in 
open ground, singly or in pairs in summer, usually in loose flocks 
in winter. The great variations in color, length of hind claw, 
etc., have given rise to several named varieties and species, all now 
referred to this one species. The bird doubtless breeds through- 
out the whole country, but I was unable to find a single nest or 
gain any reliable information as to its breeding habits. Half a 
dozen different birds of about the same size and general color are 
commonly called by the same name — “Chingolo” — and this 
bird is rarely distinguished from the common Zonotrichia , even 
by the gauchos, who are usually very observant of all living 
things found on the pampas. 
8. Parula pitiayumi ( Vieill.). — These beautiful little birds, 
so similar to our own Blue Yellow-backed Warbler, were first 
noticed at Concepcion July 7, 1880, when a single female w 7 as 
taken. A few days later they became quite abundant and were 
occasionally seen afterward until about October 1, after w 7 hich 
time I did not take any. They were quite partial to blossom- 
ing trees, especially willows, doubtless attracted by the abundance 
of insects there. 
One specimen (No. 719) seemed to be abnormal in coloring, 
showing many white feathers in the forehead ; and on skinning, 
the flesh was found thickly spotted with oval, white lumps about 
the size of the eggs of the common “blow-fly.” These were most 
numerous toward the surface of the pectoral muscles, but occurred 
also deeply imbedded in their substance as well as in the muscles 
of wings and legs. It was not practicable to examine their struc- 
ture with the microscope until the next day, when decomposition 
was so far advanced that little could be made out. In all prob- 
ability, however, they were the encysted larvae of some parasitic 
worm, though whether they had anything to do with the abnor- 
mal plumage is an open question. 
Of the breeding habits of this species nothing was learned, 
nor was the bird met with at other points visited. 
9. Geothlypis velata ( Vieill.). — Abundant in low, bushy 
ground from early October until late in January, and doubtless 
breeds. On November 6, 1879, a gaucho brought me a set of 
