15.2 Dr. R. Bowdler Sharpe ou Birds 



plaintive whistle, which swells on the ear so gradually that 

 it is almost impossible to tell from which direction it comes. 



III. List of the Species new to the Argentine Avifauna. 



[It will he seen by the foregoing list that Mr. Kerr^s re- 

 searches have added the following 29 species to the Argentine 

 avifauna. Most of these additions, it may be remarked, 

 are Paraguayan species which might naturally be expected to 

 occur on the Pilcomayo^ so close to the boundary of Para- 

 guay. — P. L. S. 



1. Hirundo erytlirogastra. 16. Celeus kerri. 



2. Tachyplionus melaleucus. 17. Dryocopus lineatus. 



3. Arremon polionotus. 18. Picumnus pilcomayensis. 



4. Cassicus albirostris. 19. Crotophaga major. 

 6. Ageleeus cyanopus. 20. Conurus nanday. 



6. Pachyrbamphus viridis. 21. Pyrrliura vittata. 



7. Synallaxis cinnamomea. 22. Glaucidium ferox. 



8. rtiaximiliani. 23. Falco albigularis. 



9. Sittosomus olivaceus. 24. Herpetotberes cacbinnans. 



10. Xipborhyncbus lafresnayanus. 25. Urubitinga zonura. 



11. Tbamnopbilus ambiguus. 26. Biisarellus nigricollis. 



12. radiatus. 27. Accipiter cbilensls. 



13. Hydropsalis furcifera. 28. Porpbyrio parvus. 



14. Cbloronerpes cbrysocblorus. 29. Cryptimis uudulatus.] 



15. Dendrobates oliviuus. 



XI. — On the Birds collected by Mr. F. J. Jackson, F.Z.S., 

 during his recent Expedition to Uganda through the Ter- 

 ritory of the Imperial British East-Africati Company. 

 By R. Bowdler Sharpe, LL.D., F.L.S., &c. mtk 

 Notes by the Collector. —Vart III.-^ 



(Plate IV.) 



This third portion of my paper gives a list of Mr. Jackson's 

 collection of Passerine Birds as far as the end of the Turdidse. 



Fam. Sylviid.e. 

 I have revised the limits of the family Sylviidse in the 

 manner proposed by Mr. Gates in bis ' Fauna of British India/ 



* For Parts I. & II., see ' Ibis," 1891, pp. 233, 587. 



