of the Loiver Pilcomayo. 123 



open spaces near the river and liable to occasional flooding 

 from it. On one occasion I observed this species fishing in 

 a shallow pool, pursuing the small fishes and shrimps by 

 hopping after them from one end of the pool to the other. 



3. POLIOPTILA DUMICOLA. {Op. Clt. '\. p. 12.) 



(No. 15G, S; 157, ? .) Fortin Page. July 7th, 1890. 



Very common in all the open woods along the banks of 

 the PilcomayOj where it is seen actively hopping about the 

 terminal branches of the trees after the manner of a Tit- 

 mouse, and occasionally uttering a succession of notes : — 

 ivhe, ivhe-ivhe-ivhe-pe-ivee . 



4. Troglodytes furvus. {Op. cit. i. p. 13.) 

 Very common. 



5. Parula pitiayumi. {Op. cit. i. p. 20.) 



(No. 41, ^ .) Near Fortin Nueve. April 5th, 1890. 

 Common in situations similar to and along with Polioptila 

 dumicola. 



6. Geothlypis velata. {Op. cit. i. p. 20.) 



(No. 183, S; 115. ¥ •) Fortin Page. August 30th, 1890. 

 Occasional : amongst scrub and coarse grass. 



7. Basileuterus auricapillus. {Op. cit. i. p. 21.) 

 llio Pilcomayo. May 3rd, 1890. 



Rare. 



8. VlREOSYLVlA CHIVI. {Op. Clt. 1. p. 22.) 



(No.4, c?.) 



Obtained at Fortin Nueve, also at Fortin Page. 



9. Cyclorhis ochrocephala. {Op. cit. i. p. 23.) 

 Fortin Page. May 31st, 1890. 



10. Progne chalybea. {Op. cit. i. p. 25.) 

 (No. 158, S-) Fortin Page. July 27th, 1890. 



-All. HiRUNDo erythrogastra (Bodd.). 



(No. 12, ^ ; 1.2"^, ? .) Puerto Juarez Celman. February 

 22nd, 1890. 



Immense numbers of this Swallow were observed at Puerto 

 Juarez C.elman on the Rio Parana, opposite Corrientes. 



