cherrie: orxithoi.ogy of the Orinoco region. 253 
Paciiyrhampiius marginatus (Lichtenstein). 
Todiis marginatus Lichtenstein. Verz. Doubl. Berliner Mus., p. 51 (1823 
— Bahia). 
Pachyrhamphus atricapillus Berlepsch & Hartert, p. 56 (Munduapo, 
Orinoco River. Suapure and La Pricion, Caura River, \'enezuela). 
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 (Burmeisterj. 
Pachyrhamphus alhinucha Burm.. P. Z. S. 1868. p. 635 (Rio de La Plata, 
near Buenos Ayres). 
Xenopsaris albinucha Ridgway, Proc. U. S. Nat. i\Ius. XR\ 1891. p. 
479 ; Berlepsch & Hartert, p. 36. 
Not uncommon along the middle Orinoco from Cindad 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 sparseh 
wooded savanna regions. In habits it is much like Pachyrhamphus. 
certain species of which it also closely, if superficially, resembles ; and 
one having observed members of that genus, and the present species, 
in the field, could not wonder at its ha,ving 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 Cotingidac. 
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' 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 Kiiipo- 
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 .\meric.i IV. 1907. pp. 77<)-7 
