GTMNOEHINA. 271 



Austr. Birds, p. 69 (1889) ; JSfehrk. Kat. Eiersamml. p. 68 (1899) ; 

 Campbell, Nests ^ Eggs Austr. Birds, i. p. 292, pi. 11 (1901) ; 

 Sharpe, Hand-l. iv. p. 276 (1903). 



The eggs of the White-backed Crow-Shrike are of the same 

 character, and exhibit as many types, as the eggs of Cr- tihieen. 

 Some specimens, however, differ from the others in being of a rather 

 deep blue colour, marked with dark umber-brown, and pale umber- 

 brown in others. Examples measure from 1'43 to 1"72 in length, 

 and from 1-04 to 1-2 in breadth. 



Grymnorhlna hyper leuca (Gould). 



Gymnorhina organicum, Gould, Sandb. Birds Austr. i. p. 178 (1865) ; 



NoHh, Nests ^ Eggs Austr. Birds, p. 60, p\. vii. fig. 9 (1889). 

 Gymnorhina leuconota, Gadow, Cat. Birds B. M. viii. p. 92, part. 



(1883). 

 Gymnorhina hyperleuca, Campbell, Nests S,- Eggs Austr. Birds, i. p. 295 



(1901) ; Sharpe, Hand-l. iv. p. 276 (1903). 



The eggs of the Tasmanian Crow-Shrike are smaller than those 

 of G. tihieen and G. leiwonota, and more uniform in colouring. 

 The commonest type of egg appears to be one in which the ground- 

 colour is pale greyish green, sparingly spotted and blotched with 

 duU purplish grey and brown or dark umber-brown. The edges of 

 the markings are usually hazy and run into the surrounding 

 ground-colour. In a second type, the ground-colour is dull bluish 

 green, densely clouded and mottled with dull lavender and two or 

 more shades of brown. Specimens measure from 1-4 to 1-52 in 

 length, and from 1 to 14 in breadth. 



1. Tasmania. ' Gould Coll. 



1. Tasmania. Gould Coll. 



1. Tasmania. Gould Coll. 



1. Tasmania. Gould CoU. 



1. Tasmania. Gould Coll. 

 4. Tasmania (C Gould). Gould Coll. 



2. Tasmania. Crowley Bequest. 

 4. Tasmania ( W. H. Bignold). Crowley Bequest. 



