162 CAMPBELL, Black-ihroaicd Ground Bird. V^^^tfT 



tipped with white, broadly on the outer, and diminishing in size 

 towards inner ones, some margined with auburn on outer web ; 

 superciliary line and consjjicuous patch on malar region, or side 

 of neck, white; lores and line through eye black; throat and 

 fore-neck black with bluish gloss ; breast and centre of abdomen 

 light buff, and separated from cinnamon-coloured flanks by 

 tract, more or less defined, of blackish marked feathers ; under 

 tail-coverts, feathers dark brown and light buff, the former colour 

 imparting a blackish spotted appearance; under wing co/erts 

 white, succeeded by small blackish patch ; quills under, lustrous 

 hair-brown with cinnamon drab tinge on inner webs. "I'ill black, 

 iris deep brown, feet lead grey" (Whitlock). 



Dimensions (in flesh). — Total length 190 mm.; wing 82 mm.; 

 culmen 16 mm. ; tarsus 28 mm. 



//oft//o/.— Haig, Nullarbor Plain, W.A., 11/10/21. 



.Idult Female* — Forehead, lores, ear-coverts, crown, nape, 

 hind-neck and mantle cinnamon-brown, blending into back, rump, 

 and upper tail-coverts auburn ; lesser and greater wing coverts 

 and primary coverts blackish brown (3), tipped with white; the 

 greater coverts being edged with drab; secondaries cinnamon- 

 brown, some striped with clove-brown ; primaries blackish 

 (clove) brown, some of outer webs, towards the base, edged with 

 light buff; tail similar to that of male; lores, superciliary stripe, 

 and malar region whitish, like breast and abdomen; chin and 

 throat mottled grey and white; fore-neck mouse grey; flanks 

 wood-brown ; under tail-coverts light buff, indistinctly marked 

 with wood-brown ; under wing-coverts more mottled than in 

 male; quills under, as in male. "Bill black, iris coffee brown, feet 

 lead grey" (Whitlock). 



Dimensions (in flesh). — Total length 185 mm.; wing 85 mm.; 

 culmen 16 mm.; tarsus 24 mm. 



Habitat.— N^retha, East-West Railway, W.A., 10/8/21. 



Immature birds more resemble the female, with under sur- 

 face, especially chin, throat and fore-neck mottled with black. 

 ■"Bill, pearv black; iris, deep brown; feet, lead grev" (Whit- 

 lock). 



Dimensions (in flesh). — Total length 185 mm.; wing 80 mm.; 

 culmen 15 mm.; tarsus 27 mm. 



A'ote. — In the series of skins examined, there is practically 

 no difference in Naretha and Haig specimens, but in a male 

 taken at Loongana (31/10/21), further into the great plain, the 

 upper surface generally is more cinnamon-rufous, perhaps caused 

 by age, as the tail feathers are somewhat abraided. Total length 

 193 mm. ; wing 84 mm. ; culmen 14 mm. ; tarsus ZS^ mm. 



B(/gs. — See descriptions by Mr. H. L. ^^'hite, page 164. 

 Field Observations by Mr. F. L. Whitlock, p. 178. 



* Type of female, the specimen figured in plate being co-type. 



