SISOPTQIS. LICHENOPS. MACHETORNIS. 189 



Genus SISOPYGIS, Oah. ^ Heine. 



SiBopygis icterophys ( Vieill.). 



(Plate IV. fig. 4.) 



Siabpygis icterophrys, Scl. 8r Suds. Argent. Orn. i. p. 125 (1888) ; Scl. 

 Cat. Birds B. M. xiv. p. 41 (1888) ; Nehrk. Kat. JEiersamml. p. 137 

 (1899) ; von Ihering, Rev. Mus. Paulista, iv. p. 225 (1900) ; Sharpe, 

 Sand-l. iii. p. 96 (1901). 



The eggs of the Yellow-browed Tyrant-bird are of a regular oval 

 form and almost devoid of gloss. They appear to be variable in 

 coloration. The examples taken in Brazil are white, sparingly 

 marked with spots and small blotches of dark umber-brown. Of 

 two others taken in Argentina, one is white, marked at the broad 

 end with umber-brown and lilac, and the other is pale pink, marked 

 with chocolate-brown and lilac. Four examples measure re- 

 spectively : -8 by -61 ; -8 by -6 ; -81 by -58 ; -79 by -58. 



2. Iguap^, Brazil, 10th Nov. Crowley Bequest. 



2. Argentine Republic. Crowley Bequest. 



Genus LICHENOPS, Sundev. 



Lichenops perspicillata {Om.). 



(Plate IV. fig. 6.) 



Lichenops perspicillata, Scl. Cat. Birds B. M. xiv. p. 48 (1888) ; id. Sf 

 Suds. Argent. Orn. i. p. 129 (1888) ; James, New List Chilian Birds, 

 p. 3 (1892) ; Solland, Ibis, 1892, p. 199 ; Lane, Ibis, 1897, p. 31 ; 

 Nehrk. Kat. Eiersamml. p. 137 (1899) ; von Ihering, Sev. Mus. 

 Paulista, iv. p. 225 (1900) ; Sharpe, Sand-l. iii. p. 97 (1901). 



The eggs of the Silver-billed Tyrant-bird are of a broad oval 

 shape and very glossy. They are white, very sparingly spotted and 

 blotched at the broad end with chestnut. They measure from '82 to 

 •85 in length, and from -63 to "66 in breadth. 



2. Argentine Republic, Nov, A. H. Holland, Esq. [C.]i 



4. Central Chile, Dec. Berkeley James Coll. 



4. Central Chile, Deo. Berkeley James Coll. 



Genus MACHETORNIS, Gray. 



Machetornis rixosa ( Vieill.). 



(Plate IV. fig. 5.) 



Machetornis rixosa, Scl. Cat. Birds B. M. xiv. p. 52 (1888) ; id. Sr Suds. 

 Argent. Orn. i. p. 131 (1888) ; Solland, Ibis, 1892, p. 199 ; Aphn, 

 Ibis, 1894, p. 178 ; Nehrk. Kat. Eiersamml. p. 137 (1899) ; von 

 Ihering, Bev. Mus. Paulista, iv. p. 226 (1900) ; Sharpe, Sand-l. iii, 

 p. 98 (1901). 



The eggs of the Short-winged Tyrant-bird are of a regular oval 



