MIMTJS. 83 



and streaked with light reddish brown over the whole surface, but 

 a little more thickly towards one end. It is slightly glossy, and 

 measures 1-1 by "8. 



1. Peru (Nehrhorn Coll.). Crowley Bequest. 



Mimus thenca (Molina). 



Tardus thenca, TMen. Foi-tpflam. ges. Voq. tab. xxiv. fig. 16 (1845-54). 

 Mimus thenca, Fraser, P. Z. 8. 1843, p. Ill ; Sharpe, Cat. Birds B. M. 



vi. p. 845 (1881) ; James, New List Chilian Birds, p. 1 (1892) ; 



Nehrk. Kat. Eiersamnd. p. 49 (1899) ; Sharpe, B.and-1. iv. p. 103 



(1903). 



The eggs of the Chilian Mocking-Thrush vary in shape from a 

 narrow to a broad oval and are moderately glossy. In ground-colour 

 they range from bluish- to greenish-white or grey ; but the character 

 of the surface-markings appears to indicate the existence of two 

 types sufficiently distinct but nevertheless connected by intermediate 

 forms. The first type, which is that figured by Thienemann (Z. c), 

 is regularly and rather thickly covered with freckles and short streaks 

 of pale reddish brown, somewhat denser at the larger end ; while the 

 eggs of the second type closely resemble in their bolder coloration 

 those of M. polyglottus. 



An intermediate example, from Convento, has the freckles larger 

 and less numerous than in the first type, the ground-colour being 

 quite conspicuous. The eggs measure from 1-07 to 1'18 in length, 

 and from -79 to -91 in breadth. 



3. Chile. Old Collection. 



3. Central Chile (Landbeck). Berkeley James Coll. 



3. Central Chile (Landbeck). Berkeley James Coll. 



3. Central Chile, Oct., Berkeley James Coll. 



3. Central Chile, Oct. Berkeley James CoU. 



1. Chile (Tristram Coll.'). Crowley Bequest. 



3. Santiago, Chile, 1st Dec. (Tnsfrawi Crowley Bequest. 



Coll.). 



1. Convento, Chile, 1st Dec. Crowley Bequest. 



Mimus modulator (Gould). 

 (Plate IV. fig. 16.) 



Mimus modulator, Sharpe, Cat. Birds B. M. vi. p. 347 (1881) ; Scl. ^ 

 Suds. Argent. Cm. i. p. 6 (1889) ; Holland, Ibis, 1892, p. 194 ; 

 Aplin, Ibis, 1894, p. 162 ; Nehrk. Kat. JSiersamml. p. 49 (1899) ; 

 Sharpe, Sand-l. iv. p. 103 (1903). 



Mimus calandria, Balgleish, Proc. R. Phys. Soc.Edin. viii. p. 81 (1880-1). 



The eggs of the Calandria Mocking-Thrush resemble those of 

 M. polyglotius in colour, but they are rather larger. The general 

 coloration, moreover, is suffused with a more rosy tint ; and the seven 

 specimens from the Crowley Bequest, apparently selected from 

 various sets, are exceedingly handsome and richer, both in ground- 



g2 



