CHERRIE: ORNITHOLOGY OF THE ORINOCO REGION. 253 



PACHYRHAMPHUS MARGINATUS (Lichtenstein). 



Todus marginatus Lichtenstein, Verz. Doubl. Berliner Mus., p. 51 (1823 



Bahia). 

 Pachyrham films atricapillus Berlepsch & Hartert, p. 56 (Munduapo, 



Orinoco River, Suapure and La Pricion, Caura River, Venezuela). 



A single specimen taken at Munduapo February 27, 1899. 



Eye seal brown; bill plumbeous with the tip (only) of maxilla 

 black; feet plumbeous. 



XENOPSARIS ALBINUCHA (Burmeister). 



Pachyrhamphus albinucha Burm., P. Z. S. 1868. p. 635 (Rio de La Plata, 



near Buenos Ay res). 

 Xenopsaris albinucha Ridgway, Proc. U. S. Nat. Mus. XIV. 1891. p. 



479; Berlepsch & Hartert, p. 36. 



Not uncommon along the middle Orinoco from Ciudad Bolivar up 

 as far, at least, as Caicara. 



Dr. Burmeister following his original description of this species 

 (/. c.} states that it "lives in the sedges of the shores of the Rio de La 

 Plata." Along the Orinoco I found it to be an inhabitant of the sparsely 

 wooded savanna regions. In habits it is much like Pachyrhamphus, 

 certain species of which it also closelv, if superficially, resembles ; and 

 one having observed members of that genus, and the present species, 

 in the field, could not wonder at its having been associated with 

 Pachyrhamphus by its describer. Also, Mr. Ridgway (/. c.) was cer- 

 tainly correct in describing the genus Xenopsaris as pertaining to the 

 family Cotingidae. 



Berlepsch and Hartert following Dr. Cabanis and Dr. Sclater asso- 

 ciate X. albinucha with the Tyrannidae "in the neighborhood of Cnipo- 

 legus," but as pointed out by Ridgway 1 the tarsus is not exaspidean. 

 It may be of interest to record my observations on the characters of the 

 tarsal covering as seen in fresh specimens of Xenopsaris and of Knipo- 

 legus. In Xenopsaris the acrotarsium covers the anterior half only. 

 The outer posterior half is covered by a series of scutella that merge, 

 at the upper end, into the papillae covering the heel, and at the lower 

 end into the papillae covered area just above the hallux. On the back 

 of the tarsus are three rows of small irregularly quadrate scutella, those 

 making up the row on the inner side being smallest (papillae like) ; 



'Birds of North and Middle America IV. 1907. pp. 776-7 



