131 TYRANNID.E. 



134. MUSCISAXICOLA RUFIVERTEX, d'Orb. et Lafr. 



(RED-TOPPED TYRANT.) 



Ptyonura rufivertex, Burm. La-Plata Reise, ii. p. 461 (Mendoza). 

 Description. Above clear cinereous ; lores and short superciliaries whitish ; 

 well-defined nape-patch bright rufous ; wings brownish ; upper tail-coverts and 

 tail black, outer margin of outer rectrix white : below clear cinereous wbite, 

 brighter on lower belly, crissum, and under wing-coverts ; bill and feet black : 

 whole length 6-5 inches, wing 4-0, tail 2-8. Female similar. 

 Hob. Peru, Bolivia, Chili, and Western Argentina. 



135. MUSCISAXICOLA MACULIROSTEIS, d'Orb. et Lafr. 

 (SPOT-BILLED TYRANT.) 



Muscisaxicola maculirostris, Scl. et Salv. Nomencl. p. 44 ; Durnford, Ibis, 

 1878, p. 395 (Centr. Patagonia). Ptyonura maculirostris, Burm. La- 

 Plata Reise, ii. p. 462 (Mendoza); 



Description. Above greyish brown, lores and slight superciliaries whitish ; 

 tail-coverts and tail black, the outer web of the outer rectrix white ; below pale 

 greyish white, whiter on the belly and crissum ; bill black, with the base of the 

 lower mandible yellowish ; feet black : whole length 5*5 inches, wing 3-4, tail 

 2*4. Female similar. 



Hab. Chili, Patagonia, Bolivia, Peru, and Western Ecuador. 



Prof. Burmeister met with this species near Mendoza, in the mouths 

 of the large torrents above the city. D urn ford found it near the river 

 Sengalen in Central Patagonia in December 1877. 



136. CENTKITES NIGER (Bodd.). 

 (RED-BACKED TYRANT.) 



Centrites niger, Burm. La-Plata Reise, ii. p. 458 ; Scl. et Salv. Nomencl p. 44 ; 

 Durnford, Ibis, 1878, p. 395 (Chupat); White, P. Z. S. 1882, p. 604 (Buenos 

 Ayres) ; Daring, Exp. al Rio Negro, Zool p. 42 (B. Colorado) ; Barrows, 

 Bull. Nutt. Orn. Cl. viii. p. 142 (Entrerios, Pampas). 



Description. Above and below deep black : whole of back except the rump 

 and scapularies chestnut ; bill and feet black ; under wing-coverts and wings 

 below black : whole length 5-0 inches, wing 2-8, tail 1-9. Female above brown, 

 back fulvous red ; tail black ; below ashy brown. 



Hab. Patagonia, Chili, and Argentina. 



The little Red-backed Tyrant comes nearest to Muscisaxicola mentalis 

 in habits, but does not perch on bushes and trees, and is less gregarious 



