REVISION OF THE GENUS MALURUS. 
This well marked form inhabits the better class of country 
between the eastern coastal watershed and the dry interior. 
Comparison of the type of assimilis with that of dawsonianus 
proves the latter name to be a synonym. 
Malarus ( M .) lamberti mastersi Mathews. 
Malurus lamberti mastersi Mathews, Nov. Zool., 18, p. 360, 1912 ; 
Alexandra, Northern Territory. 
Malurus lamberti occidentalis Mathews, ib., 18, p. 360, 1912 ; Lake Way, 
Mid- west Australia. 
Malurus lamberti mungi Mathews, ib., 18, p. 360, 1912 ; Mungi, North- 
west Australia. 
Malurus lamberti morgani S. A. White, Aust. Avian Rec., 1, p. 126, 1912 ; 
Lake Gairdner, South Australia. 
Leggeornis lamberti hartogi Mathews, Bull. B.O.C., 39, p. 24, 1918 ; Dirk 
Hartog Island, Mid-west Australia. 
Leggeornis lamberti eyrei Mellor, South Aust. Ornithologist, 6, p. 10, 
1921 ; Eyre Peninsula, South Australia. 
Range. — The interior of the continent from central-east Queensland and 
western New South Wales, west to coastal mid-west Australia and Dirk Hartog 
Island ; to Borroloola in the north and Eyre Peninsula in the south. 
Specimens examined. — 70 from the following localities — Moora Plains, 
Fitzroy River and Diamantina River, Queensland ; Borroloola, south of 
Borroloola, Northern Territory ; Barrow Creek, Palm Valley, Mission Plain, 
James Ranges, Central Australia; Cowarie, Coopers Creek, Donalds Plain' 
Wertigo (Eyre Peninsula), near Ooldea, South Australia; Upper Coongan 
River, Fortescue River, Hammersley Range, Point Cloates, Mauds Landing, 
Carnarvon, Peron Peninsula, Mid-west Australia ; Dirk Hartog Island. 
M easurements . — 
Wing Tail Exposed Culmen Tarsus 
51 males . . 47-50 (49) 63-79 (69) 8-5-10 (9) 20-22 (20-8) 
13 females .. 46-49(47-5) 62-75 (69) 8-5-9-S (8-8) 19-5-22 (20-3) 
Subspecific characters. — Darker, but nearest to typical lamberti in colour 
of head and ear-coverts ; similar to assimilis in colour of upper back ; differs 
from both in upper aspect of wing being much lighter, in which respect it 
equals bernieri. Forehead and crown light methyl blue becoming smalt blue 
on nape, which is the colour of upper back ; ear-coverts and feathers around 
eye pale methyl blue ; outer margins of wing-quills light drab, upper wing- 
coverts light drab to drab, a few of the lesser series suffused with blue and 
some of the median tipped tawny ; the white lower under surface faintly 
tinged cream-buff. LTpper surface of female hair brown. 
That specimens from such a wide area are essentially similar 
is not surprising since climatic conditions are very similar 
throughout. Apparently based on slight individual variations, 
the other races described from within this range are not, in my 
opinion, separable. It is significant that Mathews (Syst. Avium 
Aust., pt. 2, p. 624) has placed mungi as a synonym of occi- 
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