HAPALOCERCUS PLAVIVENTIUS. 137 



sides of the breast greyish ; chin and sides of throat rufous, like the lores ; 

 flanks and under wing-coverts tinged with yellowish : whole length 3'5 inches, 

 wing 1-8, tail 1-4. Female similar. 



Hab. S.E. Brazil, Bolivia, and Northern La Plata. 



This bird was observed by White near Oran, and also in Misiones. 



140. PHYLLOSCARTES VENTRALIS (Temm.). 

 (YELLOW-BELLIED TYRANT.) 



Phylloscartes ventralis, Scl. et Salv. Nomencl. p. 46 ; Barrows, Bull. Nutt. 

 Oni. CL viii. p. 198 (Entrerios). 



Description. Above uniform olive ; ill-defined superciliaries whitish ; ear- 

 coverts dark ; wings and tail blackish with olive margins ; well-defined spots 

 on the tips of the two rows of wing-coverts and outer webs of secondaries 

 yellowish : below yellow, rather white on the throat and olivaceous on the 

 sides ; under wing-coverts pale yellow ; bill and feet blackish : whole length 

 4*5 inches, wing 2*1, tail 2'3. 



Hab. S.E. Brazil and Northern La Plata. 



This species is stated to have been met with by Mr. Barrows among 

 the low bushes bordering the streams of Entrerios. Graf v. Berlepsch 

 has recorded its presence in Rio Grande do Sul (Zeitschr. ges. Orn. 

 1885, p. 131), so that this occurrence is not improbable. 



141. HAPALOCERCUS FLAVIVENTRIS (d'Orb. et Lafh). 

 (REED-TYRANT.) 



Arundinicola flaviventris, d'Orb. Voy. Ois. p. 335, pi. xxxi. fig. 1. Hapalo- 

 cercus flaviventris, Burm. La-Plata Reise, ii. p. 456 (Mendoza) ; Scl. 

 et Salv. Nomencl. p. 46 ; Durnford, Ibis, 1877, p. 177 (Buenos Ayres), et 

 1878, p. 395 (Centr. Patagonia) j White, P. Z. S: 1882, p. 605 (Buenos 

 Ayres) ; Barroivs, Bull. Nutt. Orn. CL viii. p. 199 (Entrerios). 



Description. Above mouse-brown ; wings and tail rather darker, with 

 edgings like the back ; vertex more or less tinged with rufous ; beneath yellow ; 

 under wing-coverts pale yellow ; bill and feet black : whole length 4*0 inches, 

 wing 2-0, tail 2'0. Female similar. 



Hab. S. Brazil, Paraguay, Uruguay. La Plata, and Chili. 



This little bird is rarely met with in the desert pampas, but through- 

 out the settled portion of the Buenos- Ayrean province it is one of the 

 most common species of the Tyrannida. It arrives from the north 

 in September, and is very regular in its migrations, although apparently 

 a very feeble flier. It frequents open grounds abounding in thistles, 



